Question

A Chosse the correct answer :
1. Two bodies A and B of equal mass have their velocities in the ratio 1 : 2. What will be the ratio
of their kinetic energies?
a. 2:1
b. 1:2
c. 1:4
d. 4:1
2. A device that converts light energy into electricity is
a. electric heater b. electric bulb
c. thermocouple d. photocell
3. The work done by an object does not depend on the
a. applied force
b. displacement of the body
c. initial velocity of the body
d. all of these
4. Food that we take converts
a. potential energy into kinetic energy
b. electrical energy into heat energy
c. chemical energy into heat energy
d. chemical energy into muscular energy
5. Energy chain consists of
b. chemical energy
c. heat energy
d. all of these
6. The SI unit of energy is
newton
b. joule
c. pascal
d. second
7. Which of the following is not a renewable source of energy?
b. biomass
c. wind
d. petroleum
8. The device that converts chemical energy into electrical energy is
a. dry cell
b. electric heater c. electric bulb d. thermocouple
9. Potential energy of a person is minimum when
a. he is standing
b. he is sitting on a chair
c. he is sitting on the ground
d. he is lying on the ground​

Answer 1

Explanation:

1. b
2. b
3. d
4. d
5. d
6. d
7. b
8. c
9. a
10. Bhai please rate kar dene

Answer 2

Answer:

1-b

2-b

3-d

4-d

5-d

6-b

7-d

8-d

9-b