NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 606 - 610 of 2184

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Question number: 606

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

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MCQ▾

Question

A magnetizing field of 1600 Am -1 produces a magnetic flux of 2.4 x 10 -5 weber in a bar of iron of area of cross-section 0.2 cm 2. Then,

(1) The magnetic permeability of the bar is 7.5 x 10 -4 TA -1 m

(2) The susceptibility of the bar is 596.1

(3) The magnetic permeability of the bar is 4.1 Wbm” 2

(4) The susceptibility of the bar is 496.1

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1,2 and 3 are correct

d.

1 and 3 are correct

Question number: 607

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

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MCQ▾

Question

If a particle moves in a circular path in clockwise direction after entering into a downward vertical magnetic field. The charge on the particle is-

Choices

Choice (4) Response

a.

neutral

b.

Positive

c.

Nothing can be said

d.

negative

Question number: 608

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

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MCQ▾

Question

An α-particle travels at an angle of 30° to a magnetic field 0.8 T with a velocity of 10 5 m/s. The magnitude of force will be-

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 609

» Magnetic Effects of Current and Magnetism » Bar Magnet

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MCQ▾

Question

At magnetic poles of earth, angle of dip is

Choices

Choice (4) Response

a.

180°

b.

90°

c.

45°

d.

Zero

Question number: 610

» Magnetic Effects of Current and Magnetism » Bar Magnet

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MCQ▾

Question

A bar magnet of magnetic moment 4.0 A-m 2 is free to rotate about a vertical axis through its center. The magnet is released from rest from east-west position. Kinetic energy of the magnet in north-south position will be (Horizontal component of earth’s magnetic field B H = 25μT)

Choices

Choice (4) Response

a.

10 -4 J

b.

10 -6 J

c.

0

d.

10 -2 J