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A bar magnet is oscillating in earth’s magnetic filed with a period T. What happens to its period of motion, if its mass is quadruped

Motion remains simple harmonic with new period = T/2

Motion remains simple harmonic with new period = 2T

Motion remains simple harmonic with new period = 4T

Motion remains simple harmonic and the period stays nearly constant

A coil in the shape of an equilateral triangle of side is suspended between the pole pieces of a permanent magnet such that is in plane of the coil. If due to a current I in the triangle a torque acts on it, the side of the triangle is:

The work done in turning a magnet of magnetic moment M by an angle of from the meridian, is n times the corresponding work done to turn it through an angle of . The value of n is given by

2

1

0.5

0.25

If a diamagnetic substance is brought near north or south pole of a ar magnet, it is

Attracted by the poles

Repelled by the poles

Repelled by north pole and attracted by the south pole

Attracted by the north pole and repelled by the south pole

A galvanometer having a resistance of 8 ohms is shunted by a wire of resistance 2 ohms. If the total current is 1 amp, the part of its passing through the shunt will be

0.25 amp

0.8 amp

0.2 amp

0.5 amp

A galvanometer can be converted into a voltmeter by connecting

A high resistance in parallel

A low resistance in series

A high resistance in series

A low resistance in parallel

A galvanometer acting as a voltmeter will have

A low resistance in series with its coil.

A high resistance in parallel with its coil

A high resistance in series with its coil

A low resistance in parallel with its coil

A galvanometer of 50-ohm resistance has 25 divisions. A current of ampere gives a deflection of on division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a resistance of

A galvanometer of resistance 20 gives full scale deflection with a current of 0.004 A. to convert it into an ammeter of range 1 A, the required shunt resistance should be

Motion remains simple harmonic with new period = T/2

Motion remains simple harmonic with new period = 2T

Motion remains simple harmonic with new period = 4T

Motion remains simple harmonic and the period stays nearly constant

A coil in the shape of an equilateral triangle of side is suspended between the pole pieces of a permanent magnet such that is in plane of the coil. If due to a current I in the triangle a torque acts on it, the side of the triangle is:

The work done in turning a magnet of magnetic moment M by an angle of from the meridian, is n times the corresponding work done to turn it through an angle of . The value of n is given by

2

1

0.5

0.25

If a diamagnetic substance is brought near north or south pole of a ar magnet, it is

Attracted by the poles

Repelled by the poles

Repelled by north pole and attracted by the south pole

Attracted by the north pole and repelled by the south pole

A galvanometer having a resistance of 8 ohms is shunted by a wire of resistance 2 ohms. If the total current is 1 amp, the part of its passing through the shunt will be

0.25 amp

0.8 amp

0.2 amp

0.5 amp

A galvanometer can be converted into a voltmeter by connecting

A high resistance in parallel

A low resistance in series

A high resistance in series

A low resistance in parallel

A galvanometer acting as a voltmeter will have

A low resistance in series with its coil.

A high resistance in parallel with its coil

A high resistance in series with its coil

A low resistance in parallel with its coil

A galvanometer of 50-ohm resistance has 25 divisions. A current of ampere gives a deflection of on division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a resistance of

A galvanometer of resistance 20 gives full scale deflection with a current of 0.004 A. to convert it into an ammeter of range 1 A, the required shunt resistance should be

TOPICS : MAGNETISM, CONVERSION OF GALVANOMETER TO AMMETER AND VOLTMETER

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