State two advantages of an electromagnet over a permanent magnet.

1.	State two advantages of an electromagnet over a permanent magnet.
Answer» 1. An electromagnet can produce a strong magnetic field. 2. The strength of the magnetic field of an electromagnet can easily be changed by changing the current in its solenoid.

Answer»

1. An electromagnet can produce a strong magnetic field.

2. The strength of the magnetic field of an electromagnet can easily be changed by changing the current in its solenoid.

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