| 1 |
Newton' laws of motion are valid in
|
Rotating frame of reference <br>
In all frame of reference <br>
Non-inertial frame of reference <br>
Inertial frame of reference <br>
|
| 2 |
For what colour of light refractive index of glass is minimum
|
Yellow <br>
Red <br>
Blue <br>
Violet<br>
|
| 3 |
if mass is increased by 2 times and velocity is increased by 3 time to a body then its momentum will be increased by
|
2 time <br>
3/2 times<br>
3 times <br>
6 times<br>
|
| 4 |
Effect of increasing temperature on resistance of semiconductor is
|
Increasing <br>
No change <br>
Decreasing <br>
Fluctuate <br>
|
| 5 |
In AC circuits, AC meters measure
|
Mean values <br>
Peak values <br>
Mean square <br>
Rms values <br>
|
| 6 |
When a light wave is reflected form a mirror, there is a change in its
|
Velocity <br>
Frequency <br>
Wavelength <br>
Amplitude <br>
|
| 7 |
Which one of the following types of waves are used in a night vision apparatus?
|
Infra-red waves <br>
Radio waves <br>
Microwaves <br>
None of these<br>
|
| 8 |
Sacrificial anode protects iron of ship, underground pipelines etc, from resting,. a process known as cathodic protection , which one of the following metals cannot be used as a sacrificial anode?
|
Tin <br>
Zinc <br>
Magnesium <br>
Aluminum <br>
|
| 9 |
magnets attract magnetic substances such as iron, nickel, cobalt etc, They can also repel:
|
Paramagnetic substances <br>
Ferromagnetic substances <br>
Diamagnetic substances<br>
Non-magnetic substances <br>
|
| 10 |
A jet engine works on the principle of conservation of:
|
linear momentum <br>
Energy <br>
Angular momentum <br>
Mass <br>
|
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