1 |
The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is |
- A. 2.45 watt
- B. 24.5 watt
- C. 245 watt
- D. 2.45 watt
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2 |
1 KWh = |
- A. 3.6 x 10<sup>3</sup>K
- B. 3.6 x 10<sup>6</sup>K
- C. 3.6 x 10<sup>9</sup>J
- D. 3.6 x 10<sup>12</sup>J
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3 |
Hot igneous rocks, usually in molten or partly molten state are found in the depth of |
- A. 5 km
- B. 10 km
- C. 15 km
- D. 20 km
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4 |
The unit of work in base unit is |
- A. Kg m-1 sec-2
- B. Kgm sec-2
- C. Kgm2 sec-1
- D. Kgm-1 sec-1
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5 |
The SI unit of work is |
- A. Newton
- B. Joule
- C. Mol
- D. Calorie
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6 |
The commercial unit of electric energy is |
- A. Kilo watt hour
- B. watt
- C. Watt hour
- D. Kilo Watt
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7 |
A body has P.E. = mgh, when it is at height 'h' from the ground. At the point at the distance 'x' below from the top its P.E. with |
- A. mgh
- B. mgx
- C. mg(x-h)
- D. None of these
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8 |
The dimensions of work are |
- A. MLT<sup>-1</sup>
- B. MLT<sup>-2</sup>
- C. ML<sup>2</sup>T<sup>-2</sup>
- D. ML<sup>-1</sup>T<sup>-1</sup>
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9 |
By increasing the amount of stretch in spring the force exerted will |
- A. Increase
- B. One watt
- C. One erg
- D. One joule
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10 |
When the rocket moves away from the earth, the work against gravity |
- A. Remains constant
- B. Varies directly with distance
- C. Varies inversely with distance
- D. Varies inversely with square of distance
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