Magnetic Effects of Current and Magnetism (NEET Physics): Questions 144 - 146 of 152

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Question number: 144

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

MCQ▾

Question

A particle with charge q, moving with a momentum p, enters a uniform magnetic field normally. The magnetic field has magnitude B and is confined to a region of width d, where d<pBq, The particle is deflected by an angle θ in crossing the field. Then

Uniform magnetic field with moving charge particle

Uniform Magnetic Field With Moving Charge Particle

Here in figure cross represent the uniform magnetic field is confined to a region width d. A particle with charge q is moving with a momentum p, towards this uniform magnetic field.

Choices

Choice (4) Response

a.

sinθ=Bqdp

b.

sinθ=pBqd

c.

sinθ=pdBq

d.

sinθ=Bpqd

Question number: 145

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

MCQ▾

Question

wire of length L has magnetic moment M. It is bent in to semicircular arc. The new magnetic moment is,

Choices

Choice (4) Response

a.

M2L

b.

2ML

c.

2Mπ

d.

ML

Question number: 146

» Magnetic Effects of Current and Magnetism » Magnetic Susceptibility and Permeability

MCQ▾

Question

Which of the following statements are false about the magnetic susceptibility x m of paramagnetic substance?

(1) Value of X m is directly proportional to the absolute temperature of the sample

(2) X m is negative at all temperature

(3) X m does not depend on the temperature of the sample

(4) X m is positive at all temperature

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

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