Question # 1

If a charged body is brought near a negatively charged electroscope and the leaves of electroscope diverge, then the body is:

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Positively charged

Negatively charged

Neutral

None of these

Field around a charge in which that charge exerts a force on a point charge brought in that field is called:

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Electric field

Magnetic field

Neutral zone

Point charge

Release of the energy by the sun is due to:

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Nuclear Fussion

Nuclear Fission

Burning of gases

Chemical reaction

The minimum value of angle of deviation is called:

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Minimum angle

incident angle

angle of minimum deviation

None of these

An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located:

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out beyond the centre of curvature.

at the centre of curvature

between the centre of curvature and the focal point

at the focal point

At mean position of pendulum, the potential energy of the pendulum is:

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Maximum

Minimum

Much more

Both a and c

In a convex mirror the size of the image:

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Is smaller than the size of the object

Is greater than the size of the object

Depends upon the position of the object

Is equal to the size of the object

Simplest electrical circuits use:

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One wire

Two wires

Four wires

Five wires

The sound waves are the example of:

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Longitudinal waves

Transverse waves

Electromagnetic waves

x-rays

waves whose speed is equal to speed of light are:

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X-rays

sound rays

electromagnetic waves

shock waves

The speed of sound in air at 0 ^oC is:

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331 ms^-1

332 ms^-1

333 ms^-1

336 ms^-1

The sensation of sound persists in our brain for:

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0.1 sec

0.01 sec

1 sec

10 sec

Critical angle for diamond is:

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60^o

24^o

26^o

49^o

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