Factors Affecting the Strength of Electromagnet

Which from the following materials can be used as a core in making an electromagnet?

YES or NO: The electric current has nothing to do with the strength of an electromagnet.

YES or NO: Electromagnet will function by letting electricity flow through it.

Which is an example of a temporary magnet?

YES or NO: The coils should loop in one direction only.

YES OR NO: In constructing an electromagnet, we can use any material as core.

YES or NO: The strength of an electromagnet cannot be increased.

Which part of electromagnet supplies electric current?

To strengthen an electromagnet, there is a need to _______.

A magnet is _________.