Magnetic Effects of Current and Magnetism-Bar Magnet (NEET Physics): Questions 14 - 16 of 27

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Question number: 14

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

The ratio of intensities, of magnetic field, at distances x and 2x from the center of magnet of length 2cm on its axis, will be

Choices

Choice (4) Response
a.

8: 1

b.

4: 1

c.

4: 1 approx.

d.

8: 1 approx

Question number: 15

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

A short bar magnet of magnetic moment 5.25 x 10 -2 JT -1 is placed with its axis perpendicular to the earth’s field direction. Magnitude of the earth’s field at the place is given to be 0.42 G. Ignore the length of the magnet in comparison to the distance involved. Then,

(1) The distance from the center of the magnet on its normal bisector at which the resultant field is inclined at 45° with the earth’s field is 5 cm

(2) The distance from the center of the magnet on its axis at which the resultant field inclined at 45° with the earth’s field is 6.3 cm

(3) The distance from the center of the magnet on its normal bisector at which the resultant field inclined at 45° with the earth’s field is 8.3 cm

(4) The distance from the center of the magnet on its axis at which the resultant field inclined at 45° with the earth’s field is 8 cm

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

Choices

Choice (4) Response
a.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct

Question number: 16

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

At magnetic poles of earth, angle of dip is

Choices

Choice (4) Response
a.

180°

b.

45°

c.

Zero

d.

90°

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