Magnetic Effects of Current and Magnetism (NEET Physics): Questions 62 - 67 of 152

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Question number: 62

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

MCQ▾

Question

An α-particle is moving in a magnetic field of (3i^+2j^) tesla with a velocity of 5×105i^m/s . The magnetic force acting on the particle will be

Choices

Choice (4) Response
a.

3.2×1013N

b.

3.2×1013dyne

c.

3.2×1013N

d.

0

Question number: 63

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

MCQ▾

Question

If a diamagnetic solution is poured into a U-tube and one arm of this U-tube placed between the poles of a strong magnet with the meniscus in a line with field, then the level of the solution will

Choices

Choice (4) Response
a.

Rise

b.

Oscillate slowly

c.

remain as such

d.

fall

Question number: 64

» Magnetic Effects of Current and Magnetism » Current Loop as Magnetic Dipole

MCQ▾

Question

Current i is carried in a wire of length L. If the wire is turned into a circular coil, the maximum magnitude of torque in a given magnetic field B will be,

Choices

Choice (4) Response
a.

Li2B4π

b.

L2iB4π

c.

LiB22

d.

Li2B2

Question number: 65

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

MCQ▾

Question

The universal property of all substances is

Choices

Choice (4) Response
a.

Diamagnetism

b.

all

c.

Paramagnetic

d.

Ferromagnetism

Question number: 66

» 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: 67

» 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

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