Magnetic Effects of Current and Magnetism (NEET Physics): Questions 92 - 96 of 152

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Question number: 92

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

MCQ▾

Question

An electron and a proton having same kinetic energy enter a magnetic field at right angles. If ra and rb represents the radii of curvature of circular path than rarb is,

Choices

Choice (4) Response

a.

mbma

b.

(mamb)12

c.

mamb

d.

(mbma)12

Question number: 93

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

MCQ▾

Question

A beam of protons is moving horizontally towards you. As it approaches, it passes through a magnetic field directed downward. The beam deflects-

 Finding magnetic field direction in a matrix

Finding Magnetic Field Direction in a Matrix

In figure cross indicate that the magnetic field directed downward, and the deflection of proton beam also shown in figure.

Choices

Choice (4) Response

a.

Nothing can be said

b.

To your left side

c.

Does not deflect

d.

To your right side

Question number: 94

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

MCQ▾

Question

If a diamagnetic substance is brought near north or South Pole of a bar magnet, it is

Choices

Choice (4) Response

a.

Repelled by the North Pole and attracted by the South Pole

b.

Repelled by the poles

c.

Attracted by the North Pole and repelled by the South Pole

d.

Attracted by the poles

Question number: 95

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

MCQ▾

Question

The radius of a circular loop is r and a current i is flowing in it. The equivalent magnetic moment will be

Choices

Choice (4) Response

a.

1r2

b.

iπr2

c.

ir

d.

2πir

Question number: 96

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

Question

A circular coil of 0.2 m diameter has 1000 turns and carries a current of 0.1 ampere. The intensity of magnetic field at the center of the coil is-

Choices

Choice (4) Response

a.

62.8 x 10 -4 N/A∙m

b.

6.28 x l0 -4 N/A∙m

c.

62.8 x 10 -5 N/A∙m

d.

6.28 x 10 -5 N/A∙m

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