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Physics

Physics
The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

5 cm
10 cm
15 cm
20 cm

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Physics
The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:

2 T
4 T
8 T
1 T

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Physics
Frictional force acts in

Upward direction
All the directions
The same direction as the motion
The opposite direction of the motion

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Physics
What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius ?

No change will happen
Only some ice will melt
All ice will melt
All water will become ice

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Physics
Why is weightlessness experienced while orbiting the earth in space ships ?

None of these
Zero gravity
Acceleration
Inertia

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Physics
Which of these waves can be polarized ?

Light waves
Transverse waves on a string
Sound waves in air
Longitudinal waves on a string

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MORE MCQ ON Physics

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