Question

The strength of an electromagnet can be increased by:
(a) reversing the directions of current
(b) using alternating current of high frequency
(c) increasing the current in the coil
(d) decreasing the number of turns of coil

April 3, 2024

Answer

(c) increasing the current in the coil

Reason — The strength of electromagnet can be increased by increasing the current in the coil.

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