| 1 |
Work is zero when "F" and "S" will be: |
- A. Parallel
- B. Perpendicular
- C. Anti parallel
- D. Tangent
|
| 2 |
If the velocity of the body becomes double then its kinetic energy will: |
- A. Remain the same
- B. Become double
- C. Become four times
- D. Become half
|
| 3 |
The energy present in our food is: |
- A. Mechanical energy
- B. Gravitational potential energy
- C. Chemical energy
- D. Nuclear energy
|
| 4 |
Solar cell is are also known as: |
- A. Electric cell
- B. Photo Cell
- C. Sun cells
- D. Nuclear cells
|
| 5 |
The work done in lifting a brick of mass 2 kg through a height of 5 m above the ground will be: |
- A. 2.5 J
- B. 12.5 J
- C. 50 J
- D. 100 J
|
| 6 |
The potential energy of a body of mass 'm' placed at a height 'h' above the surface of   earth is equal to |
- A. P.E. = mg
- B. P.E. = mgh
- C. P.E. = 3mgh
- D. P.E. = 2mgh
|
| 7 |
The energy stored in dam is: |
- A. Potential energy
- B. Kinetic energy
- C. Chemical enegy
- D. Nuclear energy
|
| 8 |
The energy of a body during the motion is called: |
- A. Potential energy
- B. Kinetic energy
- C. Elastic P.E.
- D. Heat energy
|
| 9 |
If 1N is force and body is displaced to 1m than work is : |
- A. 2 J
- B. 1 J
- C. 3 J
- D. 4 J
|
| 10 |
According to law of conservation of energy increases in P.E is equal to: |
- A. Increase K.E
- B. Decrease in K.E
- C. Decrease in P.E
- D. None
|
