Magnetic Effects of Current and Magnetism-Bar Magnet (AIIMS Physics): Questions 1 - 4 of 4

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Question number: 1

» Magnetic Effects of Current and Magnetism » Bar Magnet

Appeared in Year: 1995

MCQ▾

Question

Force between two identical bar magnets whose centers are r meter apart is 4.8 N when their axes are in same line. If separation is increased to 2r, the force between them is reduced to: [AIIMS]

Choices

Choice (4) Response

a.

0.6 N

b.

0.3 N

c.

1.2 N

d.

2.4 N

Question number: 2

» Magnetic Effects of Current and Magnetism » Bar Magnet

Appeared in Year: 2002

Assertion-Reason▾

Assertion (Ꭺ)

We cannot think of a magnetic field configuration with three poles.

Reason (Ꭱ)

A bar magnet does exert a torque on itself due to its own field.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

c.

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

d.

Ꭺ is true but Ꭱ is false

Question number: 3

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

Force between two identical bar magnets whose centers are a meter apart is 5.4 N when their axes are in same line. If separation is increased to 3a , the force between them is reduced to:

Choices

Choice (4) Response

a.

0.3 N

b.

2.4 N

c.

1.2 N

d.

0.6 N

Question number: 4

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

The magnetic field at a distance 30cm from a 8cm long magnet, which has magnetic pole strength 14Am , is –

Choices

Choice (4) Response

a.

1.07×104T

b.

3.7×104T

c.

2.14×104T

d.

1.5×105T

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