Engineering :: Engineering Mechanics
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| 231. |
One joule is equal to |
| A. |
0.1 N - m |
B. |
1 N - m |
| C. |
10 N - m |
D. |
100 N - m |
Answer: Option B
Explanation:
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| 232. |
Work done is said to be zero, when |
| A. |
some force acts on a body, but displacement is zero |
B. |
no force acts on a body but some displacement takes place |
| C. |
either (a) or (b) |
D. |
none of the above |
Answer: Option C
Explanation:
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| 233. |
One joule means that |
| A. |
work is done by a force of 1 N when it displaces a body through 1 m |
B. |
work is done by a force of 1 kg when it displaces a body through 1 m |
| C. |
work is done by a force of 1 dyne when it displaces a body through 1 cm |
D. |
work is done by a force of 1 g when it displaces a body through 1 cm |
Answer: Option A
Explanation:
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| 234. |
Joule is the unit of |
Answer: Option B
Explanation:
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| 235. |
The rate of doing work is known as |
| A. |
potential energy |
B. |
kinetic energy |
| C. |
power |
D. |
none of these |
Answer: Option C
Explanation:
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| 236. |
The unit of power in S.I. units is |
Answer: Option C
Explanation:
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| 237. |
One watt is equal to |
| A. |
0.1 joule / s |
B. |
1 joule / s |
| C. |
10 joules / s |
D. |
100 joules / s |
Answer: Option B
Explanation:
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| 238. |
The power developed by a body acted upon by a torque T newton metre (N - m) and revolving at ? radian / s is given by |
| A. |
T.? (in watts) |
B. |
T.? / 60 (in watts) |
| C. |
T.? / 75 (in kilowatts) |
D. |
T.? / 4500 (in kilowatts) |
Answer: Option A
Explanation:
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| 239. |
Energy may be defined as the capacity of doing work. |
Answer: Option A
Explanation:
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| 240. |
The unit of energy in S.I. units is |
Answer: Option D
Explanation:
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