Magnetic Effects of Current and Magnetism (BITSAT Physics): Questions 6 - 12 of 17

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Question number: 6

» Magnetic Effects of Current and Magnetism » Magnetic Moment

MCQ▾

Question

Two magnets each of magnetic moment M are placed so as to form a cross at right angle to each other. The magnetic moment of the system will be –

Choices

Choice (4) Response

a.

2M

b.

M

c.

2M

d.

0.5 M

Question number: 7

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

The direction of the null points is on the equatorial line of bar magnet, when the north pole of the magnet is pointing to –

Choices

Choice (4) Response

a.

North

b.

South

c.

West

d.

East

Question number: 8

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

MCQ▾

Question

The substances in which the magnetic moment of a single atom is not zero, is called as

Choices

Choice (4) Response

a.

Ferromagnetism

b.

Ferrimagnetism

c.

Diamagnetism

d.

Paramagnetism

Question number: 9

» Magnetic Effects of Current and Magnetism » Magnetic Moment

MCQ▾

Question

A bar magnet of magnetic moment 200Am2 is suspended in a magnetic field of intensity 0.25NAm the couple required to deflect it through 300 is –

Choices

Choice (4) Response

a.

20Nm

b.

25Nm

c.

50Nm

d.

15Nm

Question number: 10

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

MCQ▾

Question

For formation of permanent magnets, the material should have –

Choices

Choice (4) Response

a.

Low coercivity

b.

High coercivity

c.

High retentivity

d.

Both b. and c. are correct

Question number: 11

» Magnetic Effects of Current and Magnetism » Earth's Magnetic Field

MCQ▾

Question

At which place, earth’s magnetism becomes horizontal?

Choices

Choice (4) Response

a.

Magnetic meridian

b.

Magnetic equator

c.

Geographical pole

d.

Magnetic pole

Question number: 12

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

MCQ▾

Question

An electron moves with uniform velocity and enters a region of uniform magnetic field B . If V and B are parallel to each other, then the electron will –

Choices

Choice (4) Response

a.

Move in a direction perpendicular to B

b.

Move in a circular path

c.

Will not move.

d.

Continue to move in the same direction

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