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Explain why a bimetallic strip is used in a rotary thermometer instead of a strip with only one kind of metal.?
A bimetallic strip is made from two different metals that expand at a different rates. Two strips of these metals are bonded together, and when the temperature changes, one side expands more than the other, forcing the bimetallic strip to curl (the longer side would be on the outside of the curl). So if one end is clamped, the other moves. This motion is used to turn the dial of the thermometer.
Why does a bimetallic strip bend when heated?
A bimetallic strip bends when heated because it is composed of two different types of metal. The different metals form the two sides of the strip expand and contract at different rates when subjected to a temperature change. When heating a bimetallic strip, one side of the metals expands faster than the other, making it longer. Because it is bonded to the other metal, it cannot expand in a straight line. The only way the two metals can stay bonded while expanding at different rates, is for strip to bend, one side becoming longer than the other.
What happens when you put a bimetallic strip in the flame of a burner?
It bends towards the side that has the metal that expands the least when heat is applied.
Why does a bimetallic bar made of copper and iron strips is heated the bar bends towards the iron strip?
Two metals making up the strip have different rates of expansion, so as heat is applied and the metals expand, one metal will expand faster than the other, causing that side to grow longer faster than the other side. Since the faster growing metal strip is bonded to the slower expanding, now shorter piece of metal, some movement must occur and the only means of movement is to bend.
How does a bimetallic strip thermometer work?
It has two types of metal so when you put it on top of a candle it always curls the same way even if you flip it over........... I don't know what it's used for i have only seen it used once in a grade seven science class so that is all i know bout it.
Why is bimetallic stripes used in gadgets?
Bimetallic strips consists of two strips of fused together along their length. On one side, you'll see one metal; flip it around and you see another type. Since metals don't all expand and contract at the same rate, this bimetallic strip will be straight at only one temperature. Heat the strip up and the strip will bend because one metal will expand more than the other. This bending of the bimetallic strip is used in thermostats to regulate temperature. This strip provides a closed circuit to a heater. When it gets too hot, the strip bends and cuts off the electric current. No more heating goes on, and the strip starts to cool. When the bimetallic strip is straight again, the circuit is connected, and the heater heats up again.
Explain why a bimetallic strip is used in a rotary thermometer instead of a strip with only one kind of metal.?
A bimetallic strip is made from two different metals that expand at a different rates. Two strips of these metals are bonded together, and when the temperature changes, one side expands more than the other, forcing the bimetallic strip to curl (the longer side would be on the outside of the curl). So if one end is clamped, the other moves. This motion is used to turn the dial of the thermometer.
Why does a bimetallic strip bend when heated?
A bimetallic strip bends when heated because it is composed of two different types of metal. The different metals form the two sides of the strip expand and contract at different rates when subjected to a temperature change. When heating a bimetallic strip, one side of the metals expands faster than the other, making it longer. Because it is bonded to the other metal, it cannot expand in a straight line. The only way the two metals can stay bonded while expanding at different rates, is for strip to bend, one side becoming longer than the other.
What happens when you put a bimetallic strip in the flame of a burner?
It bends towards the side that has the metal that expands the least when heat is applied.
What happens when the Bimetallic Strip cools down?
When the bimetallic strip cools down, the metals in the strip contract at different rates due to their varying coefficients of thermal expansion. This differential contraction causes the strip to bend, with the side of the metal with higher expansion coefficient (usually the inner layer) being on the inside of the curve.
Why does a bimetallic bar made of copper and iron strips is heated the bar bends towards the iron strip?
Two metals making up the strip have different rates of expansion, so as heat is applied and the metals expand, one metal will expand faster than the other, causing that side to grow longer faster than the other side. Since the faster growing metal strip is bonded to the slower expanding, now shorter piece of metal, some movement must occur and the only means of movement is to bend.
What does the bimetallic strip in an electric iron do?
It is used as a thermostat.A thermostat is a device used to control the temperature of any equipment, in this case an electric iron.Two little strips of different types of metals are welded or brazed together. These little strips will be mounted inside the the iron near to the hot plate, held down just at one side.An electrical contact will join the bimetallic strip into the electrical circuit of the iron. Another little flat metal plate will be mounted near the free end of the bimetallic strip. This little fixed plate will touch the free end of the bimetallic strip.So now you turn the iron on. The irons' hot plate heats up. The bimetallic plate heats up too as it is close to the hot plate.Ok, now is the clever bit someone once thought out. The two strips of metal heat up and expand. As the properties of the metals are different they will expand at different amounts. As the two strips are stuck together the bimetallic strip will bend.When it bends it will eventually bend away from the fixed plate. Assuming its been installed with the bimetallic strip the right way around! because the strip will bend to the side which has the metal that expands less. When it no longer touches the plate the circuit will turn off. And hence the power is turned off to the iron.So how come that dial makes the iron hotter or less hot? When you are twisting the dial you are actually squeezing some tension into the bimetallic strip so that it will have to get hotter before it will bend away from the contact and hence break the circuit.Thats the idea!
How does a bimetallic strip thermometer work?
It has two types of metal so when you put it on top of a candle it always curls the same way even if you flip it over........... I don't know what it's used for i have only seen it used once in a grade seven science class so that is all i know bout it.
How are bimetallic strips used in electric irons?
It is used as a thermostat.A thermostat is a device used to control the temperature of any equipment, in this case an electric iron.Two little strips of different types of metals are welded or brazed together. These little strips will be mounted inside the the iron near to the hot plate, held down just at one side.An electrical contact will join the bimetallic strip into the electrical circuit of the iron. Another little flat metal plate will be mounted near the free end of the bimettalic strip. This little fixed plate will touch the free enf of the bimetallic strip.So now you turn the iron on. The irons' hot plate heats up. The bimetallic plate heats up too as it is close to the hot plate.Ok, now is the clever bit someone once thought out. The two strips of metal heat up and expand. As the properties of the metals are different they will expand at different amounts. As the two strips are stuck together the bimetallic strip will bend.When it bends it will eventually bend away from the fixed plate. Assuming its been installed with the bimettaic strip the right way around! because the strip will bend to the side which has the metal that expands less. When it no longer touches the plate the circuit will turn off. And hence the power is turned off to the iron.So how come that dial makes the iron hotter or less hot? When you are twisting the dial you are actually squeezing some tension into the bimetallic strip so that it will have to get hotter before it will bend away from the contact and hence break the circuit.
What is the principle of the bimetallic or the compound bar?
A bimetallic bar has two different metals bound together. Different metals have different coefficients of thermal expansion. As the temperature changes, the metals will expand or contract different amounts - consequently the bar will curve on the side of the one that expands the least or contracts the most (depending on whether it is warming up or cooling down).
Why does the bimetallic strip take the curved shape?
A bi-metallic strip is made of two different metals. (Duh!) Each metal has its OWN coefficient of thermal expansion, so when it heats up, one side expands more than the other does. The side that expands more causes the strip to bend toward the side that expands less.
How does bimetallic work in an electric iron?
A bimetallic strip is a strip made from 2 different metals. It is designed to bend one way if it is warm and the other way if it is cold. The hotter it gets, the more it bends. In any thermostat, the electrical contacts bend apart as the target temperature is reached. The only difference between a heating thermostat and a cooling thermostat is which side of the bimetallic strip faces the other contact. In a heating appliance, the thermostat knob turns a screw to add resistance to the motion of the contacts so they must get hotter to separate as the screw is tightened. So the tighter the screw is turned, the hotter the appliance is allowed to get before the contacts separate.
