The direction of the current can be reversed in an electromagnet but not its pole.
Hence, the given statement is false
The strength of the magnetic field between the poles of an electromagnet would be unchanged if :
(a) current in the electromagnet winding were doubled
(b) direction of current in electromagnet winding were reversed
(c) distance between the poles of electromagnet were doubled
(d) material of the core of electromagnet were changed
The strength of the electromagnet can be increased by
(a) reversing the directions of current
(b) using an alternating current of high frequency
(c) increasing the current in the coil
(d) decreasing the number of turns of coil.
The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be :
(a) north pole (b) east pole (c) south pole (d) west pole
The poles of an electromagnet can be reversed. Give the reason.