General

State two ways through which the strength of an electromagnet can be increased.

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The strength of an electromagnet depends on: Increasing he strength of the current passing through the coil, the greater the current, the greater the strength;
Increasing the number of turns in the coils, the greater the number of turns, the greater the strength;
Whether the core is made up of a soft or hard magnetic material.
Soft iron will magnetize more readily than steel.
Therefore, using a soft core increase the strength of the electromagnet.

Final answer:-

The strength of an electromagnet depends on: Increasing he strength of the current passing through the coil, the greater the current, the greater the strength;

Increasing the number of turns in the coils, the greater the number of turns, the greater the strength.

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