| 1 |
the example of mechanical waves is |
- A. Water waves
- B. Infrared waves
- C. Radio waves
- D. Ultraviolet waves
|
| 2 |
At which of the following temperature a body has maximum internal energy. |
- A. -273 <sup>o</sup>C
- B. 0 K
- C. 273 K
- D. -273 K
|
| 3 |
The minimum distance from eye at which an object appears to be distinct is |
- A. Near point
- B. Focal length
- C. Image distance from lens
- D. Object distance from lens
|
| 4 |
The word Fluid means |
- A. To rise
- B. To fall
- C. To flow
- D. To oppose
|
| 5 |
The speed of sound in ari at 0 <sup>o</sup>C is 332 ms-1, Then the speed at 40 <sup>o</sup>C will be |
- A. 372 ms-1
- B. 356 ms-1
- C. 346 ms-1
- D. 332 ms-1
|
| 6 |
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
|
| 7 |
The types of optical fibres are |
- A. Three
- B. Four
- C. Five
- D. Six
|
| 8 |
A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is. |
- A. 10 ms-1
- B. 12.2 ms-1
- C. 15 ms-1
- D. 29.4 ms-1
|
| 9 |
Efficiency of a heat engine working between 27 <sup>o</sup>C and 32 <sup>o</sup>C will be. |
- A. 50%
- B. 90%
- C. 40%
- D. 62%
|
| 10 |
Carnot cycle consists of. |
- A. Two steps
- B. Three steps
- C. Four steps
- D. Five steps
|