Question

The strength of an electromagnet can be increased by

• A. reversing the direction of current
• B. increasing current in the coil
• C. decreasing the number of turns of the coil
• D. All of these

Answer 1

The correct option is B

increasing current in the coil

An electromagnet is a temporary magnet made by winding an insulated wire in numerous turns, usually around a soft iron core. As current flows through the coil. it starts behaving like a bar magnet. The strength of the magnet increases as we increase the current flowing through the wire,