Magnetic Effects of Current and Magnetism-Moving Coil Galvanometer (NEET Physics): Questions 5 - 9 of 10

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Question number: 5

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

In a moving coil galvanometer, the deflection of the coil θ is related to the electrical current i by the relation

Choices

Choice (4) Response

a.

itanθ

b.

iθ

c.

iθ2

d.

iθ

Question number: 6

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

A solenoid of length 0.4 m and having 500 turns of wire carries a current of 3 A. A thin coil having 10 turns of wire and of radius 0.01 m carries a current of 0.4 A. The torque (in Nm) required to hold the coil in the middle of the solenoid with its axis perpendicular to the axis of the solenoid is (µ 0 = 4π x 10 -7 V-s/A-m)

Choices

Choice (4) Response

a.

0.592 x 10 -4

b.

5.92 x 10 -6

c.

59.2 x 10 -6

d.

0.592 x 10 -6

Question number: 7

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

The pole pieces of the magnet used in a pivoted coil galvanometer are

Choices

Choice (4) Response

a.

Plane surfaces of a horse-shoe magnet

b.

Cylindrical surfaces of a bar magnet

c.

Plane surfaces of a bar magnet

d.

Cylindrical surfaces of a horse-shoe magnet

Question number: 8

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

A moving coil galvanometer has N number of turns in a coil of effective area A. It carries a current I. The magnetic field B is radial. The torque acting on the coil is

Choices

Choice (4) Response

a.

N 2ABi

b.

NABi 2

c.

NA 2B 2i

d.

NABi

Question number: 9

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

A current carrying rectangular coil is placed in a uniform magnetic field. In which orientation, the coil will tend to rotate

(1) The magnetic field is parallel to the plane of the coil

(2) The magnetic field is at 45° with the plane of the coil

(3) In any orientation

(4) The magnetic field is perpendicular to the plane of

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

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