list two ways of increasing the strength of an electromagnet if the material of the electromagnet is fixed
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The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage. You can make a temporary magnet by stroking a piece of iron or steel (such as a needle) along a permanent magnet
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if it is made by spiral rod then increase the number of coils and you can also increase the electricity
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