Question # 1

The S.I unit of Spring constant is:

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Nm

N

Nm-1

Ns

Human skin, in dry conditions, has a resistance of:

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20,000 ohm

100,000 ohm

30,000 ohm

2000 ohm

electric intensity is a quantity:

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scalar

vector

base

none of these

Which device is used to increases / decreases A.C Voltage?

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Electric motor

Transformer

A.C Generator

Solenoid

When 1 kg of Uranium -235 is fused then energy released is

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67 x 10¹⁰ J

67 x 10⁷J

67 J

7 J

If we double the distance between two charges, then force becomes

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4-times

1/4th

Double

Half

If a wave moves in a slinky spring with frequency of 4Hz and wave length of 0.4m, the speed of the wave will be:

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1.0 ms-1

1.2 ms-1

1.4 ms-1

1.6 ms-1

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attract a neutral charge

Repels a neutral charge

The distance between two consecutive waves compressions or rarefactions is called:

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Focal length

Wave length

Frequency

Time period

If a dielectric medium is present between two point charges them electrostatic force will be:

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Increased

Decreased

Vanishes

Remain same

The S.I unit of electric current is:

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Volt

Ampere

Coulomb

Watt

1 bel=

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0.1 dB

10 dB

100 dB

0.01 dB

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

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