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Physics

Physics
Brightness of bulb depends on voltage or current?

None
Current
Both A & B
Voltage

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Physics
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?

1.0479166666667
0.12847222222222
2.0958333333333
0.21041666666667

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Physics
Suitable impurities are added to a semiconductor depending on its use. This is done in order to

increase its life
increase its electrical conductivity
increase its electrical resistivity
enable it to withstand higher voltages

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Physics
Radio waves sent out by a radio stations are reflected by

Stratosphere
Mesosphere
Troposphere
Ionosphere

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Physics
A simple microscope consists of :

A long focus convex lens
A long focus concave lens
A short focus concave lens
A short focus convex lens

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Physics
The weight of a body acts through the centre of

Buoyancy
Both (A) and (B)
Gravity
Mass

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MORE MCQ ON Physics

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