A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each:

(a) two revolutions
(b) one revolution
(c) half revolution
(d) one-fourth revolution

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Solution

(c) half revolution
If a rectangular coil of copper wire is rotated in a magnetic field, the direction of magnetic field to the given side of coil changes after half revolution and the direction of induced current also changes simultaneously.

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Q. Question 4
Choose the correct option.
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each
(a) two revolutions
(b) one revolution
(c) half revolution
(d) one-fourth revolution

Q. A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each

Q. In an electric motor, the direction of current in the coil changes once in each:

(a) two rotations
(b) one rotation
(c) half rotation
(d) one-fourth rotation

Match the following:

(i) Straight angle (a) Less than one-fourth of a revolution

(ii) Right angle (b) More than half a revolution

(iii) Acute angle (c) Half of a revolution

(iv) Obtuse angle (d) One-fourth of a revolution

(v) Reflex angle (e) Between of a revolution

(f) One complete revolution

Question 1

Match the following:

(i) Straight angle (a) less than one-fourth a revolution
(ii) Right angle (b) more than half a revolution
(iii) Acute angle (c) half of a revolution
(iv) Obtuse angle (d) one-fourth a revolution
(v) Reflex angle (e) between $\frac{1}{4}$ and $\frac{1}{2}$ of a revolution
(f) One complete revolution

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A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each: (a) two revolutions (b) one revolution (c) half revolution (d) one-fourth revolution

(c) half revolution If a rectangular coil of copper wire is rotated in a magnetic field, the direction of magnetic field to the given side of coil changes after half revolution and the direction of induced current also changes simultaneously.

A rectangular coil of copper wire is rotated in a magnetic field. The direction of induced current changes once in each:

(a) two revolutions
(b) one revolution
(c) half revolution
(d) one-fourth revolution

(c) half revolution
If a rectangular coil of copper wire is rotated in a magnetic field, the direction of magnetic field to the given side of coil changes after half revolution and the direction of induced current also changes simultaneously.