Question # 1

The coulomb's law is valid for the charges which are:

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moving and point charges

moving and non-point charges

stationary and pont charges

stationary and large size charges

The waves in which particles of the medium vibrate perpendicular to the direction of waves are:

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Electromagnetic waves

Sound waves

Both a and b

Transverse waves

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Mirror

Lens

The waves, which are used to detect the broken bones, are called:

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Light waves

x-rays

Sound waves

both b,c,

The minimum value of angle of deviation is called:

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Minimum angle

incident angle

angle of minimum deviation

None of these

The distance between two consecutive troughs or crests is called:

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wavelength

Frequency

Time period

None of these

The number of wavelength of waves passing through a point in one secnd is called:

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Time period

Cycle

Frequency

None of these

electroscope can also be charges by the process of:

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electrostatics

electricity

convection

conduction

In CD presence of pits is indicated by:

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0

2

3

1

One coulomb is equal to charge of ________ electrons.

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6.25 x 10^-19

6.25 x 10¹⁹

6.25 x 10¹⁸

6.25 x 10^-18

Mathematical formula of sound level (in bel) is:

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S.L = 10 log I/Io (bel)

S.L = K log I/Io (bel)

S.L = Log I/Io (bel)

S.L = 10 log Io/I (bel)

Specific resistance of silver = ________ x 10^-sOhm-meter

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5.25

2.75

1.69

1.62

The speed of sound was accurately measured in:

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1736

1737

1738

1739

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