Magnetic Effects of Current and Magnetism (NEET Physics): Questions 23 - 25 of 152

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Question number: 23

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

The correct statements regarding the lines of force of the magnetic field B are

(1) Magnetic intensity is a measure of lines of force passing through unit area held normal to it

(2) Magnetic lines of force form a closed curve

(3) Due to a magnet magnetic lines of force never cut each other

(4) Inside a magnet, its magnetic lines of force move from North pole of a magnet towards its South pole

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.

2 and 4 are correct

d.

1 and 3 are correct

Question number: 24

» 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: 25

» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field

MCQ▾

Question

What is the net force on the square coil?

Current carrying square coil ABCD

Current Carrying Square Coil ABCD

In figure 1 A current carrying a square coil is indicate and a conducting straight 2A current carrying wire placed beside it.

Choices

Choice (4) Response
a.

25 x 10 -7 N towards wire

b.

25 x 10 -7 N away from wire

c.

35 x 10 -7 N towards wire

d.

35 x 10 -7 N away from wire

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