NEET Physics: Questions 657 - 661 of 2098

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Question number: 657

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

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.

Circle

c.

Helix

d.

Straight line

Question number: 658

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

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.

3

b.

1

c.

4

d.

2

Question number: 659

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

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.

2: 1: 3

d.

1: 1: 1

Question number: 660

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

Assertion-Reason▾

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 true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

Both Ꭺ and Ꭱ are false

Question number: 661

» Magnetic Effects of Current and Magnetism » Earth's Magnetic Field

MCQ▾

Question

A long straight horizontal cable carries a current of 2.5 A in the direction 10° south of west to 10° north of east. The magnetic meridian of the place happens to be 10° west of the geographic meridian. The earth’s magnetic field at the location is 0.33 Gauss, and the angle of dip is zero. Distance of the line of neutral points from the cable is, (Ignore the thickness of the cable).

Choices

Choice (4) Response

a.

3.5 cm

b.

2.0 cm

c.

2.5 cm

d.

1.5 cm

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