Sources of Heat

Q. Why do most stainless steel pans have copper bottoms?

1. Copper bottom makes the pan more durable.
2. Copper is cheaper than steel.
3. Copper is a worse conductor of heat than steel.
4. Copper is a better conductor of heat than steel.

Q. is the ultimate source of energy.

1. Sun
2. Wind
3. Moon

Q.

Which is the ultimate source of energy?

1. Water

2. Sun

3. Uranium

4. Fossil fuels

Q. Solar energy is the energy which is obtained from the radiations of the Sun.

1. False
2. True

Q. In which among the following, heat transfer happens through conduction:

1. Solids
2. Liquids
3. Gases
4. All of the above.

Q. Which of the following is a bad conductor of heat?

1. Steel
2. Copper
3. Ceramic
4. Iron

Q. Identify the mode of heat transfer as labelled in the image below.

1. A-Convection, B-Conduction, C-Radiation
2. A-Conduction, B-Convection, C-Radiation
3. A-Radiation, B-Conduction, C-Convection
4. A-Radiation, B-Convection, C-Conduction

Q. is the ultimate source of energy.

1. Sun
2. Wind
3. Moon

Q. Solar energy is the energy which is obtained from the radiations of the Sun.

1. False
2. True

Q. When we rub two bodies together, heat is generated.

1. False
2. True