Heat Energy

Q.

The main source of heat is

1. Electricity

2. The stars

3. The sun

4. None of the options

Q. What is the SI unit to measure heat?

1. joule
2. kilogram
3. second
4. meter

Q.

Which of the following forms of energy causes water to evaporate from water bodies?

1. Chemical energy

2. Heat energy

3. Light energy

4. Sound energy

Q.

What is the black body temperature of Earth?

Q.

Which of the following forms of energy is responsible for maintaining Earth’s temperature?

1. Chemical energy

2. Heat energy

3. Sound energy

4. Light energy

Q. What type of energy transformation takes place when ice is converted into water ?

1. heat energy to kinetic energy
2. kinetic energy to heat energy
3. heat energy to latent heat
4. heat energy to potential energy

Q. Latent heat of vaporization of water is $538$ cal/g. During the conversion of $1$ g of water to steam, if the external work done is $168$J, the increase in internal energy is :

1. $80cal$
2. $638cal$
3. $498cal$
4. $538cal$

Q.

Which of the following energy forms is measured in Calorie?

1. Heat energy

2. Light energy

3. Chemical energy

4. Sound energy