Magnetism in an electromagnet can be switched on or off.

True

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False

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Solution

The correct option is A True
An electromagnet behaves as a magnet only when an electric current flows through it.
Higher the magnitude of electric current flowing through the electromagnet, the stronger the magnetic field of the electromagnet and vice versa.
An electromagnet is provided with a switch that can allow or stop the flow of current in the electromagnet and consequently can switch on or switch off the magnetism of the electromagnet.
Hence, the given statement is true.

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Similar questions

Q. Which statement about electromagnets is incorrect?
(a) They have a core of steel.
(b) They remain magnets when electricity is switched off.
(c) They can function only when electricity is switched on.
(d) They can be used to lift heavy iron loads.

Q. Can an electromagnetic wave be deflected by an electric field or a magnetic field?

An electromagnet loses its magnetism when the current is switched off.

Four substances, A, B, C, and D, are tested to be used as a core for an electromagnet. The results are given below. Which substance will be most suitable as an electromagnet of maximum strength?

Number of iron paper clips held to the electromagnet when the current is switched ON and switched OFF respectively.

Electromagnets do not get demagnetised on switching off current.

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