0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Why does a bimetallic strip curve when it is heated or cooled?
"A bimetallic strip is made of two different metals stacked in a thin strip. Because different metals expand at different rates, one of the metals expands more than the other when the strip gets hot. This makes the strip coil and uncoil in response to changes in temperature=As the room temperature drops below the desired level, the bimetallic strip coils more tightly, and the glass tube tilts. A drop of mercury closes an electric circuit that turns the heater on. As the room temperature rises above the desired level, the bimetallic strip uncoils slightly, becoming larger. The drop of mercury rolls back in the tube, opening the electric circuit and the heater turns off."==Quote from Holt, Rinehart, and Winston Physical Science Textbook=
What happens when carbon monoxide is passed over red hot iron at 120c?
It would cool the iron. Iron is red hot at about 700 C
Why does a bimetallic strip curve when it is heated?
A bimetallic strip consists of two metal strips fastened together. Metals are chosen that expand at different rates when the strips get hot. When one strip gets longer than the other, the combination has to bend. These strips are often used in thermostats in houses to control the house temperature. When the strip is cold, it bends one way, and as it gets hotter it bends the other way. You can build the strip into a control box so that when it is cold, it closes an electric circuit and turns on the heat. When it gets a bit warmer, it will bend away from the contact point and open the circuit, turning off the heat. It will sit there all day and night turning on the heat when it gets a little cold and turning it off again when it is warmer.
Where would you use what is a bimetallic strip?
A bi metallic strip is simply two different metal strips sandwitched together. When the bimetallic strip heats up it bends because one of the metals expands more than the other one when it gets hot. Bi metallic strips are used in cars. When the engine heats up too much the bi metallic strip bends to open the cooling valve (thermostat) to let coolant circulate around the engine body to cool it down. Then the strip bends back once it gets cool again. So its like a heat switch. Bi metallic strips are used for anything that needs a heat switch.
Why the wires leading to an electric iron remains cold while the element gets hot?
This happens because wire have less resistance.
What happens to a hot bimetallic strip when it is cooled to room temperature?
It Melts:P.
How do you know the expansivity of a bimetallic strip?
You can test the bimetallic strip's expansivity by placing it in a hot or cold environment, such as a refrigerator or a Bunsen burner. The strip that contracts or expands more has a higher expansivity than the other.
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 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.
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.
Any 5 gadgets in which bimetallic strip is used?
They're all thermostats of on kind or another: home, car, stove, hot-water heater,
Why does a bimetallic strip curve when it is heated or cooled?
"A bimetallic strip is made of two different metals stacked in a thin strip. Because different metals expand at different rates, one of the metals expands more than the other when the strip gets hot. This makes the strip coil and uncoil in response to changes in temperature=As the room temperature drops below the desired level, the bimetallic strip coils more tightly, and the glass tube tilts. A drop of mercury closes an electric circuit that turns the heater on. As the room temperature rises above the desired level, the bimetallic strip uncoils slightly, becoming larger. The drop of mercury rolls back in the tube, opening the electric circuit and the heater turns off."==Quote from Holt, Rinehart, and Winston Physical Science Textbook=
What happens when carbon monoxide is passed over red hot iron at 120c?
It would cool the iron. Iron is red hot at about 700 C
Why does a bimetallic strip curve when it is heated?
A bimetallic strip consists of two metal strips fastened together. Metals are chosen that expand at different rates when the strips get hot. When one strip gets longer than the other, the combination has to bend. These strips are often used in thermostats in houses to control the house temperature. When the strip is cold, it bends one way, and as it gets hotter it bends the other way. You can build the strip into a control box so that when it is cold, it closes an electric circuit and turns on the heat. When it gets a bit warmer, it will bend away from the contact point and open the circuit, turning off the heat. It will sit there all day and night turning on the heat when it gets a little cold and turning it off again when it is warmer.
Contains a piece of metal that bends when its hot?
A thermostat is the most common item containing a bimetallic strip.
Where would you use what is a bimetallic strip?
A bi metallic strip is simply two different metal strips sandwitched together. When the bimetallic strip heats up it bends because one of the metals expands more than the other one when it gets hot. Bi metallic strips are used in cars. When the engine heats up too much the bi metallic strip bends to open the cooling valve (thermostat) to let coolant circulate around the engine body to cool it down. Then the strip bends back once it gets cool again. So its like a heat switch. Bi metallic strips are used for anything that needs a heat switch.
What makes Christmas lights blink?
A strand of blinking lights has one bulb that allows electricity to go to the other lights until a bimetallic strip in it gets hot enough to bend the strip and break the circuit causing electricity to stop going to the other lights. The lights then stay off until the bimetallic strip cools and bends back to its original position to conduct electricity again. There are other more complicated ways to control strings of lights using electronic control circuitry, but the blinker bulb is the way most of them work because of its low cost.
