Advertisements
Advertisements
प्रश्न
What is the criterion of choosing the two metals for a bimetal strip?
Advertisements
उत्तर
Two different metals are used for regulating temperature in an electrical device as the strip bends due to different coefficients of expansion on excessive heating due to current, thus breaking the electrical circuit until the strip cools down to a preset point.
APPEARS IN
संबंधित प्रश्न
How does the anomalous expansion of water help aquatic organisms in cold climates?
On what basis and how will you determine whether air is saturated with vapour or not?
On a winter day the temperature of the tap water is 20°C whereas the room temperature is 5°C. Water is stored in a tank of capacity 0.5 m3 for household use. If it were possible to use the heat liberated by the water to lift a 10 kg mass vertically, how high can it be lifted as the water comes to the room temperature? Take g = 10 m s−2.
At what temperature is the density of water is maximum? State its value.
What do you understand by the anomalous expansion of water?
Explain, why are soft drink bottles not completely filled?
Explain why do vegetables and fruits get damaged during severe frost?
Write scientific reason.
Placing a plastic bottle filled with water in the freezing compartment in the freezer can cause the bottle to explode.
