Advertisements
Advertisements
Question
What is the criterion of choosing the two metals for a bimetal strip?
Advertisements
Solution
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
RELATED QUESTIONS
Explain the following:
How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?
A calorimeter contains 50 g of water at 50°C. The temperature falls to 45°C in 10 minutes. When the calorimeter contains 100 g of water at 50°C, it takes 18 minutes for the temperature to become 45°C. Find the water equivalent of the calorimeter.
Draw a graph between volume and temperature, when 5 cm3 of ice at -10°C is heated to form water at +10°C.
Explain, why does a glass bottle completely filled with water and tightly capped burst when placed in a freezer?
A deep pond of water has its top layer frozen. What will be the likely temperature of water layer just in contact with ice?
Study the following diagrams and write down your observations.
_______ apparatus is used to study the anomalous behaviour of water.
Observe the following diagram and write the answers to the questions given below.
- Which process does the graph represent?
- What is the range of temperature responsible for the behaviour?
