Magnetic Effects of Current and Magnetism (AIIMS (All India Institute of Medical Sciences) Physics): Questions 44 - 47 of 49

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Question number: 44

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

Question

A long straight wire carries a constant current distributed uniformly over a cross section perpendicular to the axis of the wire. If the current density is . The magnitudes of the magnetic field at

(a) 3.0 mm from the axis of the wire and

(b) 6.0 mm from the axis of the wire is: -

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 45

» Magnetic Effects of Current and Magnetism » Magnet Oscillations

MCQ▾

Question

A compass needle oscillates 10 times per minute at a place where dip is and 30 times per minute where the dip is . Compare the total magnetic field of earth at two places.

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 46

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

Question

A current of flows through two long parallel wires. The magnetic force on each wire is If their currents makes doubled and separation between them makes of initial value then magnetic force per unit length of each wire becomes –

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 47

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

The magnetic field at a distance from a long magnet, which has magnetic pole strength , is –

Choices

Choice (4) Response

a.

b.

c.

d.

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