Question # 1

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

The RMS value of alternating current is:

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0.7 times at the peak value

0.5 times the peak value

0.7 times the Instantaneous value

Equal to maximum voltage

None of these

The third band of the colour code:

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Gives the number of zeroes

Is decimal multiplier

Gives the resistance tolerance

Gives the third digit

Both (A) and (B)

0.0001210 has ____________ significant figures.

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Four

Three

Seven

Eight

The relation between charge 'Q' and current 'I' is given by

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Q = I/t

Q = It

Q = I²t

Q = I²/t

The work done moving a body between two points in a conservation field is independent of the:

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Direction

Force applied

Path followed by the body `

Power

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

An aircraft is moving with a velocity of 300 ms^-1. If all the forces acting on it are balanced, then

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It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

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inverting input

non-inverting input

any one of the input terminal

none of them

The reactance of a coil when used in the domestic A.C. power supply (220 volts, 50 cycles per second) is 50 ohms. The inductance of the coil is nearly

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2.2 henry

1.6 henry

0.22 henry

0.16 henry

If the potential difference across the two plates of a capacitor is double, then its energy stored in will be

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2 times

5 times

4 times

Remains the same

The relative permitivity ∈_r for transformer oil is

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2.9

3.0

2.1

2.4

Which of the following material have young and bulk modulus are same

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Brass

Bone

Aluminum

Steel

Stress beyond which a permanent deformation is observed in a body is called

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Minimum stress

Maximum

Yield stress

Plastic stress

Assuming the earth to be a sphere of radius 6400 km. What is the value of acceleration due to gravity at a height of 800 km above the surface of the earth ?

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5.35 ms^-1

6.35 ms^-2

7.35 ms^-2

8.35 ms^-2

If resultant of two forces (F and F) acting on a point is F,then the angle between two forces is.

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0°

45°

60°

120°

Consult page 50 of your text and trick the correct statement.

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Velocity of x-rays is greater than velocity of light

Velocity of right light is less than velocity of radio waves

Velocity of light, x-rays and radio waves is the same

None of the above is correct

The rotational analogue of power is given by

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τω

τv

F ω

τ/ω

The velocity of a projectile is maximum

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at the point of projection

just before striking the ground

none of them

both of them

Each atom in a metal crystal:

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Remains fixed

Vibrates about a fixed point

Moves randomly

Rotates about the centre of the crystal

None of these

Two point charge +3μC and +8μC repel each other with a force of 40 N if a charge of -5μC us added to each of them then the force between them will become

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-10 N

+10 N

+20 N

-20 N

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