| 1 |
In Einstein's mass-energy equation c means speed of light. Its value is: |
- A. 3 x 10<sup>-8</sup> ms<sup>-1</sup>
- B. 3 x 10<sup>8</sup>ms<sup>-1</sup>
- C. 3 x 10<sup>9</sup>ms<sup>-1</sup>
- D. 3 x 10<sup>18</sup>ms<sup>-1</sup>
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| 2 |
In falling object potential energy is covered to: |
- A. K.E
- B. Force
- C. P.E
- D. Nil
|
| 3 |
1 mega watt is equal to: |
- A. 10<sup>2</sup> W
- B. 10<sup>3</sup> W
- C. 10<sup>5</sup> W
- D. 10<sup>6</sup>W
|
| 4 |
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
|
| 5 |
The S.I unit of efficiency is : |
- A. J/s
- B. Nm
- C. watt
- D. It has no unit
|
| 6 |
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
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| 7 |
The speed of light is equal to: |
- A. 3 x 10<sup>5</sup> ms<sup>-1</sup>
- B. 3 x 10<sup>8</sup>ms<sup>-1</sup>
- C. 3 x 10<sup>9</sup>ms<sup>-1</sup>
- D. 3 x 10<sup>2</sup>ms<sup>-1</sup>
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| 8 |
_____________ can neither be created nor be destroyed. |
- A. Light
- B. Force
- C. Energy
- D. Weight
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| 9 |
The energy stored in dam is: |
- A. Potential energy
- B. Kinetic energy
- C. Chemical enegy
- D. Nuclear energy
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| 10 |
If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be |
- A. Maximum
- B. Minimum
- C. Zero
- D. None of these
|
