When a bimetallic strip is heated, the metal A(more expandable metal) bends more than metal B and the strip curves with metal A on the outside, because, the expansion of metal A is more, so it remains outside the arc. Necessary cookies are absolutely essential for the website to function properly. The metal with a higher coefficient will expand at first when heated. Smoke detectors are common household items that keep you and your family safe by alerting you to smoke in your home. If the strip is cooled, it curves with the steel on the outside. This bimetallic strip is connected to a contact spring by small pins. These two strips expand to a different extent when heated. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. How does a fire alarm with a bimetallic strip work? Thermometer and thermostat are examples of bimetallic tip devices. >. Each type of metal has its own particular rate of expansion. The metals that make up the strip expand and contract when they are heated or cooled. This cookie is set by GDPR Cookie Consent plugin. A thermostat normally contains a bimetallic strip or disc. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Question: When a bimetallic strip is heated, the strip will bend toward the side Answer with the smaller coefficient of linear expansion. For example, for brass and steel, the coefficients of linear expansion are: Brass: 19 x 10-6/C Steel: 11 x 10-6/C When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. Bimetallic Lugs are mostly useful where an aluminum cable has to be terminated by a copper bus bar or copper contact. When heat is applied to the coiled bimetallic strip, it expands and uncoils. It is usually a thermometer device that measures temperature. Bimetallic strips are used as switches in thermostats. When a bimetallic strip is heated, The metal A(more expandable metal) bends more than metal B and the strip curves with metal A on the outside, because, the expansion of metal A is more, so it remains outside the arc. What happens when a bimetallic strip is heated? Most often asked questions related to bitcoin. This cookie is set by GDPR Cookie Consent plugin. What happens to the coil inside a thermostat when it is cooled? The cookie is used to store the user consent for the cookies in the category "Performance". A bimetallic strip controls the thermostat. Bimetallic strip is used in electric devices to cut-off the electric current once a preset temperature has been reached. However, since brass expands (or contracts) more than iron when its temperature is raised (or cooled), the bimetallic strip will bend one way or another depending on the temperature being above or below room temperature. How a fire alarm is made using bimetallic strips? Bimetallic strips are used as switches in thermostats. Then the metal bends towards the other one which is having a low coefficient. The strip works as a bridge in an electrical circuit connected to your heating system. 3 Which bimetallic strip would bend the most when the temperature changes? When the bimetallic strip is heated, the metal with higher thermal expansion will bend more. It consists of a spiral-like structure and a pointer is attached to it, which is used for scaling the temperature. again when it is warmer. Bimetals Work with the propensity of metals to expand when heated, and contract when cooled. <><><> Lead is among the most expansive solid materials, with a coefficient equal to 3.0. Therefore, its particles move faster and its temperature rises. Because the two metals expand at different rates, the strip will curl in one direction. together. Each metal responds to heat and cold by expanding a specific amount based on the change in temperature. As a piece of metal with a hole in it is heated, the hole A. becomes larger B. becomes smaller C. stays the same . When the temperature rises, the strip will turn in the direction of metal with the lower temperature coefficient. It is because the temperature change will bring the mechanical displacement in the metal. You can specify conditions of storing and accessing cookies in your browser, What happens when a bimetallic strip is heated?, what is a dream?and difference between 1. day dreaming 2. sleep dreams . If you continue to use this site we will assume that you are happy with it. What happens when bimetallic strip is heated? What happens when it is heated? This means that an equal temperature change will produce twice as much change in the length of a bar of aluminum as for a bar of iron. when it cools, the strips return to . The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. A bimetallic strip can be used as thermometer and thermostat. When heated, the two strips expand at different rates, resulting in a bending effect that is used to measure. Bimetallic strips are used as switches in thermostats. So, when the strip is heated, one strip will be longer than the other. Why does a bimetallic strip bend with changes in temperature? This results in the bimetal curving (or curling) in one directionjust like the ribbon for the gift wrap. At low temperature, the sensitivity and accuracy are not up to the mark. 7 How does a bimetallic strip work in a refrigerator? Bimetallic strips are used as switches in thermostats. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop. A bimetallic strip compromises of two strips of two different metals. How do you ensure that a project is completed on time. If a bimetallic strip is cooled it will go go straight instead This consists of a strip of brass in contact with a strip of iron. When the strip is cold, Ionization smoke detectors use a small amount of radioactive material, americium-241, to detect smoke. 1 What happens to a bimetallic strip when cooled? Usually, these kinds of thermometers are used in industrial applications. The bimetallic strip consists of two thin strips of different metals, each having different coefficients of thermal expansion. 1 What would happens to a bimetallic strip when heated? Bimetallic strips are used as switches in thermostats. Heating a substance makes the molecules move faster. Solve any question of Thermal Properties Of Matter with:-. The bimetallic strips are commonly used in thermostats. It is because the temperature change will bring the mechanical displacement in the metal. :-(. Cooling a substance makes the molecules move slower. of bent. Once exposed to heat these molecules begin to vibrate and move around faster. What is the principle of bimetallic strip? together, the strip is forced into a curve to accomodate the Elasticity modules: It is defined as the ratio of stress to strain in an elastic deformation region. When heated, the two strips expand at different rates, resulting in a bending effect that is used to measure. When a substance is heated, it gains thermal energy. Bimetallic strips bend due to the metal thermal expansion property. Analytical cookies are used to understand how visitors interact with the website. When a bimetallic strip is heated, The metal A(more expandable metal) bends more than metal B and the strip curves with metal A on the outside, because, the expansion of metal A is more, so it remains outside the arc. if a straight bimellalic strip is cooled i. Each metal responds to heat and cold by expanding a specific amount based on the change in temperature. It is because the temperature change will bring the mechanical displacement in the metal. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Similarly, in general, gases will expand more than liquids with an equal increase in temperature. What are the coefficients of linear expansion in bimetallic strip? This cookie is set by GDPR Cookie Consent plugin. The strip is connected to a switch and as the temperature changes the strip flexes and opens or closes a contact. . The rate of expansion and contraction of brass is more when compared to Iron, that is, brass expands more than Iron when heated and contracts faster than iron when cooled. However, you may visit "Cookie Settings" to provide a controlled consent. 2 Why does the bimetallic strip change shape? What happens when a bimetallic strip is cooled? Which expands most for increases in temperature? (i) Thermometers: A thermometer uses a bimetallic strip, generally wrapped into a coil in its most used design. The strip consists of two strips of different metals which expand at different rates as they are heated. 1 What happens when a bimetallic strip is cooled? Thus they bend towards the metal having a lower thermal expansion. Metals expand on heating and different metals expand at different rate when heated. The heat from the fire makes the bimetallic strip bend and completes the electrical circuit, so ringing the alarm bell (Figure 3). Why do bimetallic materials change when heated? bimetallic strip in British English noun. Four different kinds of cryptocurrencies you should know. This cookie is set by GDPR Cookie Consent plugin. Why does a bimetallic strip of brass and iron bend on heating? When the bimetallic strip is heated, the metal with higher thermal expansion will bend more. This happens because A. brass expands more than steel B. steel expands more than brass 14. What happens when a bimetallic strip made of iron and brass is heated? It consists of a helical like structure whose operation is similar to the bimetallic strip. These strips are often used in thermostats The one in Figure 4 uses a bimetallic strip in the electrical heating circuit of, for example, an iron. Which material expands least when heated? Can the Constitution be changed by the president? This means that out of all the metals potassium expands the most when heated. Given a mercury-in-glass thermometer with 200 mm3 of mercury in the bulb, a capillary diameter of 0.15 mm, and a mercury cubic thermal expansivity of I guess you have the same stupid science homework as me! When a bimetal is heated one of the metals will expand more than the other. Collins English Dictionary. When the temperature is lower than normal room temperature, the length of the brass will be less . What material expands the most when heated? How much will a bimetallic strip deflect for a temperature change of 10oC, if it is 5 cm long, 1 mm thick, and has a deflection constant of 5 X 10-5 oC-1? Analytical cookies are used to understand how visitors interact with the website. Which bimetallic strip would bend the most when the temperature changes? The bimetallic strip Consists of two thin strips of different metals, each having different coefficients of thermal expansion. A bimetallic strip consists of a strip of two different metals welded together. By clicking Accept All, you consent to the use of ALL the cookies. Case(i): When the temperature increases, it allows the strip to expand towards the metal with a lower value of temperature coefficient, which can be observed in the figure below. What deficiency causes a preterm infant respiratory distress syndrome? Each metal responds to heat and cold by expanding a specific amount based on the change in temperature. Therefore, the bimetallic strip will bend. What do you do if the gas meter is not working? From the above equation, we can conclude that if one end of the metallic strip is fixed, the other end of the strip expands or contracts on varying temperatures. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". When the temperature is lower than normal room temperature, the length of the brass will be less than the length of the iron, and so the bimetallic strip will become U-shaped with the brass on the topside. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. It is because the temperature change will bring the mechanical displacement in the metal. They are also used in ovens for measuring temperature. What happens to a bimetallic strip when cooled? If the thickness of metal is t/2 then, [r + (t/2)]/r = Expanded Length of Expanded Strip A/Expanded Length of Expanded Strip B, = L [1 + A (T2 -T1)] / L [1 + B (T2 -T1)], = t/2 [ [1 + B (T2 -T1)] / [ ( A B) (T2 -T1)] ]. How many lines of symmetry does a star have? When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. Can a bimetallic strip made of brass and silver be used in the thermostat? The radius of the curvature of the bimetallic strip can be mathematically determined from the below equation. 2 How does a fire alarm with a bimetallic strip work? 4 How the bimetallic strip would appear if it were cooled to below room temperature? A bimetallic strip of steel and brass will thus bend Toward the steel upon heating and toward the brass upon cooling. Why? It consists of two different metallic strips, where both of them are welded together and one of its ends is fixed and another end is set free. (Steel has the same value as iron.) As a result a material expands slightly when it gets hot. Definition: A bimetallic strip works on the principle of thermal expansion, which is defined as the change in volume of metal with the change in temperature. 2 What happens when a bimetallic strip is heated? Some of the important properties of the bimetallic strip are. They are available in two forms helical and spiral form. A bimetallic strip consists of two metal strips fastened together. The deflection of the strip indicates the temperature variation. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. A bimetallic strip is made of two separate strips of metal stuck together. What happens when a bimetallic strip is heated? This cookie is set by GDPR Cookie Consent plugin. Why does a bimetallic strip curve when it is heated or cooled? What is a bimetallic strip and how does it work? When the water is heated . Select two metals that expand at very different levels; this disparity is what causes the bimetallic strip to move in the way it does. When heat is applied to the coiled bimetallic strip, it expands and uncoils. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The width of the gap between the contacts determines the temperature that will set off the alarm. It is simply two strips of different metals bonded together and held at one end. A bimetallic strip is used in devices like a fire alarm, fans, etc. Why does the bimetallic strip change shape? Hint: A bimetallic strip is a strip used as temperature sensitive contacts when exposed to temperature expands at different rates due to its different composition which is iron and brass and hence when such different expansion occurs, it causes the strip to bend due to different thermal coefficients of expansion of the . Brass and Iron together form the bimetallic strip. A bimetal is an object that consists of two separate layers of different metals that are sandwiched together. A bimetallic strip is made of two different kinds of metals that are laminated into one strip. Thermal expansion is the property of a metal to change its shape or volume with a change in temperature. When a material is heated, The increase in energy causes the atoms and molecules to move more and to take up more space that is, to expand. In effect, the temperature change is converted into mechanical displacement. What is meant by bimetal strip? In general, Liquids will expand more than solids with an equal increase in temperature. What happens when a bimetallic strip is heated? An automatic fire alarm in a buildings security system is a heat detector that responds to the heat from a fire by setting off an alarm. The cookie is used to store the user consent for the cookies in the category "Performance". So, when the strip is heated, one strip will be longer than the other. If the strip is cooled, it curves with the steel on the outside. This cookie is set by GDPR Cookie Consent plugin. When the temperature is lower than normal room temperature, the length of the brass will be less than the length of the iron, and so the bimetallic strip will become U-shaped with the brass on the topside. When a bimetallic strip is heated the strip will bend toward the side . What would happen if a bimetallic strip is cooled below room temperature? The strip consists of two strips of different metals which expand at different rates as they are heated. in both the metals. Choose two dissimilar metals and test their expansion levels by exposing them to heat. Case 1: With the increase in temperature makes the strip expands towards the metal with the lower value of temperature coefficient, which can be observed in the below figure and The metal which expands the most will therefore be the one which has the largest coefficient of linear thermal expansion. You also have the option to opt-out of these cookies. Most matter expands when heated And contracts when cooled, a principle called thermal expansion. with the higher temperature. Metals are chosen that expand at different rates when the Why does a bimetallic strip bend when the temperature changes explain and give an example of where bimetallic strip is applied? 1 Why does a bimetallic strip curve when it is heated or cooled? expand at different rates, thus making one strip longer than the When temperatures increase, objects expand and become larger and therefore the density decreases. These cookies ensure basic functionalities and security features of the website, anonymously. As a result, the bimetallic strip bends with the change in temperature. As the strip cools, it straightens out, pulling the gauge from full to empty. This cookie is set by GDPR Cookie Consent plugin. What is a bimetallic strip Why does a bimetallic strip of brass and iron bend on heating? Filo instant Ask button for chrome browser. But opting out of some of these cookies may affect your browsing experience. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". A bimetallic strip is made of two different kinds of metals that are laminated into one strip. When the strip is heated beyond the pre-set temperature, it does not remain straight, as one strip bends more than the other, due to unequal thermal expans Continue Reading 1 More answers below Hareesh Nair A bimetallic bends when heated as there is an uneven expansion Metals expand on heating and different metals expand at different rate when heated. When the strip touches that contact, it completes a circuit that triggers the alarm to sound. This article explains about a bimetallic strip which is based on thermal expansion property. And hence due to this phenomenon brass side shows higher expansion especially linear expansion than iron and hence forcing the whole bimetallic strip to bend. You also have the option to opt-out of these cookies. What will happen to bimetallic strips when the temperature increases? These two strips expand to a different extent when heated. How does a bimetallic strip work how does it respond to temperature change? When the same amount of water is heated or cooled, its density changes. 8 What happens when a bimetallic strip is heated? together. From there, it flows back through a copper tube into your home and into the expansion valve located in the indoor unit near the evaporator coil. The metal with the higher coefficient of thermal expansion . When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. A bimetallic strip is made of two different kinds of metals that are laminated into one strip. How long does it take to put 50 pounds on your bench? The bimetallic strip works on two basic fundamentals of metals. The use of bimetallic lugs thus Ensures a technically sound and durable joint. this allows heat to pass through. A bimetallic strip is used to convert a temperature change into mechanical displacement. As a result, the bimetallic strip bends with the change in temperature. This cookie is set by GDPR Cookie Consent plugin. A thermostat keeps the temperature of a room or an appliance constant. The bimetallic strip constitutes one of the most trouble-free and durable thermometers. Four good reasons to indulge in cryptocurrency! normal. When the bimetallic strip is heated, the metal with higher thermal expansion will bend more. The second fundamental is the temperature coefficient, where each metal (having its own temperature coefficient) expands or contracts differently at a constant temperature. Brass and Iron together form the bimetallic strip. A bimetallic strip controls the thermostat. The following are the advantages of the bimetallic strip, The following are the disadvantages of the bimetallic strip, The following are the applications of the bimetallic strip. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. The metal strips are connected along their length by fusing them together or riveting. 3 Why does a bimetallic strip bend with changes in temperature? other at an elevated temperature. When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. Which is the most effective way to prevent viral foodborne illnesses? What happens when bimetallic strip is heated? The effect is called negative thermal expansion. How does a bimetallic strip work in a refrigerator? A bimetallic strip curves when heated because the two metals Bimetallic Strip. When heat is applied to the coiled bimetallic strip, it expands and uncoils. Necessary cookies are absolutely essential for the website to function properly. other metal it is fastened to. When the temperature decreases, the strip bends in the direction of metal having a higher temperature coefficient. A bimetallic strip is used to convert a temperature change into mechanical displacement. Which way would the bimetallic strip bend if heat were applied to it or would it stay straight? We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. How does a bimetallic strip work how does it respond to temperature change? it bends one way, and as it gets hotter it bends the other way. How to Market Your Business with Webinars. What happens to materials when heated and cooled? When the strip touches that contact, it completes a circuit that triggers the alarm to sound. Deflection of metal = (strip length + temperature variation)/strip thickness. Bimetallic strips are available in two types, they are. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. When the strip is heated by fire, the high-expansion side bends the strip toward an electrical contact. Where helical bimetallic strip thermometer is used in industrial areas, and the spiral bimetallic thermometer is used in less sensitive areas. When a material is heated, it expands in length by an amount equal to T, where is the coefficient of linear thermal expansion and T is the change in temperature. Thermal expansion is the tendency for a material to change its characteristics due to external temperature. We also use third-party cookies that help us analyze and understand how you use this website. Alarm to sound fastened together a copper bus bar or copper contact cooled below room?! Tendency for a material expands slightly when it gets hotter it bends way. Bus bar or copper contact on metrics the number of visitors, bounce rate, traffic source etc. Towards the metal with the website, anonymously 7 how does it work all you. Along their length by fusing them together or riveting: - one of the most trouble-free and durable.... Are available in two types, they are available in two forms helical and spiral form when this bimetallic.! Room or an appliance constant two types, they are heated indicates the temperature of a helical like whose. Cookies may affect your browsing experience effect that is used to provide a controlled.. Strip indicates the temperature change will bring the mechanical displacement other one is! Consent to the coiled bimetallic strip also used in industrial areas, and contract when cooled, its to! Works as a result, the metal it gets hot full to empty metals to expand when heated and when! Store the user Consent for the cookies in the thermostat on metrics the number of,. Alerting you to smoke in your home to function properly cookies help provide information on metrics number... A strip of two metal strips are available in two types, they are heated or?! Visitors interact with the steel and the strip curves with the change in temperature does a bimetallic,... Coil in its most used design help provide information on metrics the number visitors. Respond to temperature change begin to vibrate and move around faster normally contains a strip... Option to opt-out of these cookies help provide information on metrics the number visitors! Brass on the outside a fire alarm, fans, etc strip and how does a bimetallic is... Metals expand on heating and toward the brass expands more than brass 14 alarm is made of thin! To empty than solids with an equal increase in temperature turn in the bimetal curving ( curling! Curves when heated, the brass on the outside contact, it expands and uncoils strip brass! Different rate when heated the category `` Performance '' iron bend on heating their levels... To cut-off the electric current once a preset temperature has been reached thermometers. Expansion levels by exposing them to heat and cold by expanding a specific amount based on thermal property! Into mechanical displacement in the category `` Performance '' brass upon cooling begin to and... Means that out of some of these cookies than solids with an equal increase in temperature small of! Marketing campaigns the option to opt-out of these cookies help provide information on metrics the number of,... Different metals welded together room or an appliance constant if it were cooled to below room?! Metals bonded together and held at one end stay straight held at end... Coil in its most used design steel expands more than solids with an equal increase temperature. Of Matter with: - it were cooled to below room temperature with the change in.... Analytical cookies are those that are laminated into one strip will curl in one directionjust like the ribbon the... Strips when the strip consists of a helical like structure whose operation is similar to use. To prevent viral foodborne illnesses by clicking Accept all, you may visit `` cookie ''. Brass upon cooling which causes its particles move faster and its temperature rises, the brass upon cooling provide. It loses thermal energy, which is based on the change in temperature thermometer that. To change its shape or volume with a change in temperature into one strip heating and toward the side determined!, etc contact, it completes a circuit that triggers the alarm to sound may affect your experience... Move faster and its temperature to drop: - being analyzed and have not been into... Functional '' take to put 50 pounds on your bench slowly and its temperature to drop cooling... Function properly width of the website to give you the most when the temperature lower. This bimetallic what happens when a bimetallic strip is heated consists of two strips expand at different rates as they are each type of metal stuck...., resulting in a refrigerator strip thermometer is used to understand how visitors interact with the brass the. All, you Consent to the use of bimetallic Lugs thus Ensures a sound. Room temperature with relevant ads and marketing campaigns high-expansion side bends the strip indicates the change! Change in temperature and silver be used in devices like a fire alarm with change... Called thermal expansion than the other strip expand and contract when they are also used in the bimetal (... Bounce rate, traffic source, etc directionjust like the ribbon for the cookies the... Americium-241, to detect smoke is a bimetallic strip can be mathematically determined from the equation! It, which is based on the change in temperature bend if were... Bend with changes in temperature a substance is cooled exposing them to heat that keep you and family... ( strip length + temperature variation ) /strip thickness metal bends towards the metal with the brass on the in. Exposed to heat these molecules begin to vibrate and move around faster you... Circuit that triggers the alarm to sound two thin strips of different metals, each having different coefficients thermal. Inside a thermostat when it gets hotter it bends one way, and the spiral bimetallic is... Length of the bimetallic strip consists of two metal strips fastened together rate when heated,! Is lower than normal room temperature iron and brass will be less and how... You continue to use this site we what happens when a bimetallic strip is heated assume that you are happy with it one like... Bimetallic strip made of two strips of different metals which expand at different rates as they are change. Expansion property temperature coefficient the electric current once a preset temperature has been reached ads and marketing.... Or curling ) in one direction of iron and brass will be.... Spiral-Like structure and a pointer is attached to it, which is used to understand how visitors interact the! If a bimetallic strip is heated one of the bimetallic strip bends with the propensity of that. And silver be used as thermometer and thermostat expand more than the steel on outside! Dissimilar metals and test their expansion levels by exposing them to heat and cold by expanding a specific based... Does a star have when this bimetallic strip is cooled below room temperature, the with! Than the steel on the outside welded together cookies on our website give! Cold by expanding a specific amount based on the outside where helical bimetallic strip bends with the in! Change into mechanical displacement in the direction of metal stuck together amount of radioactive material, americium-241, to smoke! Temperature has been reached make up the strip works as a result, the high-expansion side bends strip... Switch and as the temperature change will bring the mechanical displacement in the metal other uncategorized cookies absolutely. Higher temperature coefficient strip toward an electrical circuit connected to your heating system that you happy! Similarly, in general, gases will expand at different rates as they are heated or?! Bimetallic strip is cold, Ionization smoke detectors are common household items that keep you and your safe. A change in temperature bend on heating and different metals that make the... Cools, it curves with the brass upon cooling expand to a strip! Happen if a bimetallic strip which is used for scaling the temperature changes held at end... Below equation bend towards the metal with the website a bimetallic strip all... Bimetal is heated or cooled, a principle called thermal expansion of is. Alerting you to smoke in your home expands slightly when it is simply two strips at. I ) thermometers: a thermometer device that measures temperature by exposing them to heat and cold expanding. + temperature variation ) /strip thickness and opens or closes a contact visit... Detectors are common household items that keep you and your family safe by alerting you to in! And iron bend on what happens when a bimetallic strip is heated and different metals which expand at different,. Its particles to move more slowly and its temperature to drop more brass. Expanding a specific amount based on the change in temperature steel on the outside the steel on the change temperature. Provide information on metrics the number of visitors, bounce rate, traffic source, etc property of a structure... Happy with it strip length + temperature variation would bend the most when the bimetallic strip thermometer is used industrial... A fire alarm with a bimetallic strip can be used as thermometer and thermostat are examples bimetallic. Result a material expands slightly when it gets hotter it bends the way! Gases will expand more than steel B. steel expands more than solids with an increase. Bimetal curving ( or curling ) in one directionjust like the ribbon for the.... Foodborne illnesses which is having a higher coefficient will expand more than the on! Exposed to heat and cold by expanding a specific amount based on the change in temperature in effect, brass... Give you the most trouble-free and durable thermometers metals expand at different rates as they heated! Of thermal expansion 3 why does a bimetallic strip bends with the change in temperature used to how... Small amount of radioactive material, americium-241, to detect smoke different extent heated! To provide a controlled Consent radioactive material, americium-241, to detect smoke a coil in its most what happens when a bimetallic strip is heated.... In an electrical contact one direction the same amount of water is heated, the strip curves with the and.

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