Question

Statements given below are incorrect. Write the correct statements.

When a soft iron rod is placed in an insulated coil carrying current, it changes into permanent magnet.

Answer 1

1. In the process of making an electromagnet, a soft iron rod is placed in an insulated coil carrying current.
2. After some time it changes into an electromagnet.
3. The piece of iron will show its magnetic property until there is a flow of current.
4. As the electric flow of current is stopped the magnetism will also be stopped.

Hence, the given statement is true and the correct statement is, that when a soft iron rod is placed in an insulated coil carrying current, it changes into an electromagnet.