Magnetic Effects of Current and Magnetism (NEET Physics): Questions 79 - 83 of 152

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Question number: 79

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

MCQ▾

Question

An electron beam passes through a magnetic field of 2 x 10 -3 weber/m 2 and an electric field of 1.0 x 10 4 volt/m both acting simultaneously. If the electric field is removed, what will be the radius of the electron path?

Choices

Choice (4) Response

a.

1.43 cm.

b.

0.43 cm

c.

3.43 cm.

d.

2.43 cm.

Question number: 80

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

MCQ▾

Question

A circular coil has radius 4 cm and 20 number of turns carries a current of 3 ampere. It is placed in a magnetic field of intensity 0.5 weber/m 2. The magnetic dipole moment of the coil is, (take π=227)

Choices

Choice (4) Response

a.

0.45 ampere m 2

b.

0.3 ampere m 2

c.

0.6 ampere m 2

d.

0.15 ampere m 2

Question number: 81

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

MCQ▾

Question

Dimensional formula of μ 0 is-

Choices

Choice (4) Response

a.

MLT -2 A 2

b.

MLT -2 A -2

c.

MLT 2 A -2

d.

MLT 2 A 2

Question number: 82

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

Question

A solenoid of length 0.2m has 500 turns on it. If 8.71 x 10 -6 Weber/m 2 be the magnetic field at an end of the solenoid, then the current flowing in the solenoid is –

Choices

Choice (4) Response

a.

0.0174pi A

b.

17.4πA

c.

0.174πA

d.

174πA

Question number: 83

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

Assertion-Reason▾

Assertion (Ꭺ)

The permeability of a ferromagnetic material dependent on the magnetic field.

Reason (Ꭱ)

Permeability of a material is a constant quantity.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are false

d.

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

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