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Physics

Physics
Brightness of bulb depends on voltage or current?

None
Voltage
Both A & B
Current

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Physics
Which one of the waves have the longest wavelength

Green
Red
Violet
Blue

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Physics
Oil rises up the wick in a lamp because

Of the surface tension phenomenon
Oil is very light
Of the capillary action phenomenon
Of the diffusion of oil through the wick

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Physics
The purpose of choke in a fluorescent lamp is :

To decrease the current flow
Ro decrease the voltage momentarily
To decrease the resistance
To increase the current flow

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Physics
Beta rays emitted by a radioactive material are

Electromagnetic radiations
Charged particles emitted by nucleus
The electrons orbiting around the nucleus
Neutral particles

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Physics
Time of exposure required for taking photograph of an object depends upon the

Size of the object
Proximity of object
Skill of photographer
Brightness of the object

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MORE MCQ ON Physics

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