Magnetic Effects of Current and Magnetism-Moving Coil Galvanometer (NEET Physics): Questions 1 - 4 of 10

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Question number: 1

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

The sensitivity of a moving coil galvanometer can be increased by

(1) Decreasing the couple per unit twist of the suspension

(2) Increasing the number of turns in the coil

(3) Decreasing the area of the coil

(4) Decreasing the magnetic field

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

Choices

Choice (4) Response
a.

1 and 2 are correct

b.

1 and 3 are correct

c.

2 and 4 are correct

d.

1, 2 and 3 are correct

Question number: 2

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

In ballistic galvanometer, the frame on which the coil is wound is non-metallic. It is

Choices

Choice (4) Response
a.

To increase the production of eddy currents

b.

To increase the production of induced emf

c.

To avoid the production of induced emf

d.

To avoid the production of eddy currents

Question number: 3

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

Assertion-Reason▾

Assertion (Ꭺ)

The coil is bound over the metallic frame in moving coil galvanometer.

Reason (Ꭱ)

The metallic frame help in making steady deflection without any oscillation.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
b. Both Ꭺ and Ꭱ are false
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Ꭺ is false but Ꭱ is true

Question number: 4

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

The deflection in a moving coil galvanometer is

Choices

Choice (4) Response
a.

Inversely proportional to the area of the coil

b.

Directly proportional to the number of turns in the coil

c.

Directly proportional to the torsional constant

d.

Inversely proportional to the current flowing

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