Magnetic Effects of Current and Magnetism (NEET Physics): Questions 9 - 14 of 152

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Question number: 9

» Magnetic Effects of Current and Magnetism » Cyclotron

Assertion-Reason▾

Assertion (Ꭺ)

Cyclotron does not accelerate electron.

Reason (Ꭱ)

Mass of the electron is very small.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are false
d. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 10

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

MCQ▾

Question

If a magnetic substance is kept in a magnetic field, then which of the following substance is thrown out?

Choices

Choice (4) Response
a.

Antiferromagnetic

b.

Paramagnetic

c.

Diamagnetic

d.

Ferromagnetic

Question number: 11

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

MCQ▾

Question

Diamagnetic substances are

Choices

Choice (4) Response
a.

Feebly attracted by magnets

b.

Strongly repelled by magnets

c.

Feebly repelled by magnets

d.

Strongly attracted by magnets

Question number: 12

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

A 30 cm long bar magnet is placed in the magnetic meridian with its north pole pointing south. The neutral point is obtained at a distance of 40 cm from the center of the magnet. Pole strength of the magnet is (The. horizontal component of earth’s magnetic field is 0.34 Gauss)

Choices

Choice (4) Response
a.

12.7 Am

b.

16.7 Am

c.

26.7 Am

d.

15.2 Am

Question number: 13

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

At magnetic equator of earth, angle of dip is

Choices

Choice (4) Response
a.

45°

b.

Zero

c.

180°

d.

90°

Question number: 14

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

MCQ▾

Question

For the arrangement of two current carrying identical coils shown in the figure, the magnetic field at the center O is (N and a represent number of turns and radius of each coil) -

Current carrying identical coils

Current Carrying Identical Coils

In figure two current carrying identical coils arranged perpendicularly to each other. O is the center of these coils.

Choices

Choice (4) Response
a.

μ0NI2a

b.

μ0NI2

c.

μ0NI2a

d.

μ0NI22a

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