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A magnet is in the form of a bar. Initially, the axis of the bar magnet is along X-axis. At some distance from the magnet, a coil is kept in the Y to Z plane with its centre along X-axis. Which of the following motions of the bar magnet will NOT induce electric current in the coil?

(a) Translational vibrations perpendicular to X-axis. 

(b) The bar magnet axis is turned to make an acute angle with the X-axis and the magnet is rotated about X-axis with the south pole fixed on x-axis.

(c) The bar magnet axis is swinging back and forth about the X-axis with the south pole fixed on the X-axis.

(d) The bar magnet spins about a perpendicular bisector as its axis of rotation, with its center on the X-axis.

1 Answer

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Best answer

Correct option: (b) The bar magnet axis is turned to make an acute angle with the X-axis and the magnet is rotated about X-axis with the south pole fixed on X-axis.

Explanation:

No change in flux.

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