Question

Choose the correct statements from the below mentioned statements:-

• A. Electromagnets are made of soft iron while permanent magnets are made of steel.
• B. Polarity of an electromagnet can be reversed but polarity of permanent magnet cannot be reversed.
• C. Magnetic field of electromagnet is weak while magnetic field of permanent magnet is very strong
• D. Electromagnet cannot be easily demagnetised while permanent magnet can be easily demagnetised.

Answer 1

Answer: (A), (B)

The correct options are
A

Electromagnets are made of soft iron while permanent magnets are made of steel.

B

Polarity of an electromagnet can be reversed but polarity of permanent magnet cannot be reversed.

Electromagnets are made of soft iron while permanent magnets are made of steel.

The polarity of an electromagnet can be reversed but the polarity of the permanent magnet cannot be reversed

The magnetic field of an electromagnet can be very strong but magnetic field of the permanent magnet is not so strong.

An electromagnet can be demagnetised by switching off the current while permanent magnets cannot be easily demagnetised.