Which of the following statements is NOT correct with respect to an electromagnet?
It loses its magnetism as soon as the current flow is stopped.
An electromagnet is always more powerful than a permanent magnet.
An iron core is better suited than an aluminium core for an electromagnet.
Its strength is directly proportional to the number of turns in its coil.
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Which of the following statements is NOT correct with respect to an electromagnet?
It loses its magnetism as soon as the current flow is stopped.
An electromagnet is always more powerful than a permanent magnet.
An iron core is better suited than an aluminium core for an electromagnet.
Its strength is directly proportional to the number of turns in its coil.
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