Magnetic Movement - Questions & Answers | Exam2Win

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1. The moment of the couple acting on a magnet of moment of 0.2 Am2 placed at an angle of 30° with the direction of a uniform magnetic fields of strength 50 amp-turn/m is

A. 10 Nm

B. 2 Nm

C. 5 Nm

D. 50 Nm

Explanation:

2. A thin uniform wire of length 1 m is magnetized and bent into a semicircle of radius r. Then the ratio of magnetic moments of unbent wire is

A. 1 : r

B. r : 1

C. π : 2

D. 2π : 1

Explanation:

3. When a bar magnet is suspended in a uniform magnetic field, the bar magnet

A. will move along the direction of the field

B. will move opposite to the direction of the field

C. will move perpendicular to the field

D. will turn in the filed

Explanation:

4. If a magnet is kept at right angles to a field of unit magnetic field, then the moment of the magnet is given by

A. M = 2m  H

B. M=2l sin θ

C. M=2l tan θ

D. M=2ml

Explanation:

5. A bar magnet kept in a magnetic field

A. becomes parallel to the field

B. aligns at right to the field

C. turns by 45°

D. turns by 90°

Explanation:

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