NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 658 - 661 of 2320

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Question number: 658

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

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MCQ▾

Question

A charged particle is released from rest in a region of steady uniform electric and magnetic fields which are parallel to each other. The particle will move in a

Choices

Choice (4)Response

a.

Cycloid

b.

Straight line

c.

Circle

d.

Helix

Question number: 659

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

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MCQ▾

Question

When a piece of a ferromagnetic substance is put in a uniform magnetic field, the flux density inside it is four times the flux density away from the piece. The magnetic permeability of the material is

Choices

Choice (4)Response

a.

2

b.

1

c.

4

d.

3

Question number: 660

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

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MCQ▾

Question

A proton, a deuteron and an α-particle are accelerated through same potential difference and then they enter a normal uniform magnetic field. The ratio of their kinetic energies will be-

Choices

Choice (4)Response

a.

1: 2: 4

b.

1: 1: 2

c.

1: 1: 1

d.

2: 1: 3

Question number: 661

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

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Assertion-Reason▾

Question

Assertion (Ꭺ)

A paramagnetic sample displays greater magnetization (for the same magnetizing field) when cooled.

Reason (Ꭱ)

The magnetization does not depend on temperature.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

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

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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