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Damped Oscillations

A wire loop i...

Question

A wire loop is rotated in a magnetic field.The frequency of change of direction of the induced e.m.f.is (1) Twice per revolution (2) Four times per revolution (3) Six times per revolution (4) Once per revolution

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Q. 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

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 copper disc of radius

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Q. The angular velocity of a body changes from one revolution per 9 second to 1 revolution per second without applying any torque. the ratio of its radius of gyration in the two cases is,

Q. The angular velocity of a body changes from one revolution per

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revolution per second without applying any torque the ratio of its radius of gyration in the two cases is.

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