Answer :

The strength of electromagnet depends on the following factors:

i) Number of turns in the coil: Increasing the number of turns in the coil increase the strength of magnetic field produced by the electromagnet.


ii) Current flowing through the coil: Increasing the current flowing through the coil increases the strength of magnetic field produced.


iii) Length of air gap between its poles: Decreasing he length of air gap between the poles of electromagnet increases the strength of electromagnet.


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