Question

Difference between Electromagnet and Permanent magnet............​

Answer 1

Explanation:

1. Permanent magnet is not so strong, but electromagnet is very strong.

2. The strength of permanent magnet can't be changed, but that of electromagnet can be changed by changing the number of turns or the amount of current.

3. Permanent magnet has permanent magnetism, but the magnetism in electromagnet is temporary.

4. The polarity of permanent magnet can't be changed, but that of an electromagnet can be changed by changing the position of positive and negative termianls.

Answer 2

Answer:

• electromagnet produces magnetic field as long as current flows through it.

permanentmagnet produce permanent magnetic fields.

• in elctromagnet strength of magnetic field can be changed.

in permanent magnet strength of magnetic field cannot be changed.

• it can be easily demagnetised.

it cannot be easily demagnetised.

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