Magnetic Effects of Current and Magnetism (NEET Physics): Questions 4 - 8 of 152

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Question number: 4

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

MCQ▾

Question

current carrying loop is free to turn in a uniform magnetic field. The loop will then come into equilibrium when its plane is inclined at

Choices

Choice (4) Response

a.

45° to the direction of the field

b.

0° to the direction of the field

c.

135° to the direction of the field

d.

90° to the direction of the field

Question number: 5

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

A short bar magnet is placed with its north pole pointing south. The neutral point is 10 cm away from the center of the magnet. If H = 0.4 gauss, calculate magnetic moment of the magnet.

Choices

Choice (4) Response

a.

lAm 2

b.

2Am 2

c.

0.2Am 2

d.

0.1 Am 2

Question number: 6

» Magnetic Effects of Current and Magnetism » Bar Magnet

Assertion-Reason▾

Assertion (Ꭺ)

We cannot think of magnetic field configuration with three poles.

Reason (Ꭱ)

A bar magnet does not exert a torque on itself due to its own field.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Ꭺ is true but Ꭱ is false

Question number: 7

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

In the hysteresis cycle, the value of H needed to make the intensity of magnetization zero is called

Choices

Choice (4) Response

a.

Coercive force

b.

Retentivity

c.

Lorentz force

d.

None

Question number: 8

» Magnetic Effects of Current and Magnetism » Cyclotron

MCQ▾

Question

Which of these particles in motion is not affected by magnetic field B?

Choices

Choice (4) Response

a.

α-particle

b.

proton

c.

neutron

d.

Electron

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