Question # 1

Value of ‘k’ depends upon:

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System of unit

Nature of medium

Both a and b

None of these

Boolean expression for AND operation is:

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X = A̅

X = A + B

X = A . B

X = A̅B̅

During S.H.M acceleration of the body is maximum at:

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Mean position

Extreme positions

Between mean & Extereme

None of these

The refractive index of internal coating of optical fibre is:

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1.56

1.51

1.53

1.58

The resistance of conductors is due to:

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Protons

Fixed atoms

Molecules

Neutrons

Joule’s law is W=

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IR/t

IRt²

IR²t

I²Rt

The angle of which prism deviates the incident ray is called:

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angle of incident

angle of reflection

angle of deviation

angle of minimum deviation

In electric motor, the brushes are made of:

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Lead

Graphite

Iron

Wood

Mathematical formula of capacitance of a capacitor is:

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C = QV

C = Q/V

C = V/Q

C = V2/Q

A large ripple tank with a vibrator working at a frequency of 30 Hz produces 25 complete wae in distance of 50 cm. The velocity of the wave is:

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54 cms^-1

60 cms^-1

750 cms^-1

1500 cms^-1

An object gains excess negative charge after being rubbed against another object, which is:

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Neutral

Negatively charged

Charged

Either, a,b,and c

study of charges at rest is called:

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acoustics

electrostatics

electronics

electricity

Which of the following is a method of energy transfer.

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Conduction

Reatiation

wave motion

all of these

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