Magnetic Effects of Current and Magnetism (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 68 - 72 of 155

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 68

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

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.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

Question number: 69

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

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.

Positive

b.

Nothing can be said

c.

neutral

d.

negative

Question number: 70

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

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.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 71

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

At magnetic poles of earth, angle of dip is

Choices

Choice (4) Response

a.

180°

b.

45°

c.

Zero

d.

90°

Question number: 72

» Magnetic Effects of Current and Magnetism » Bar Magnet

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 -6 J

b.

10 -4 J

c.

0

d.

10 -2 J

f Page
Sign In