Electromagnet Concepts and Applications

What is a unique feature of electromagnets compared to regular magnets?

• They can be switched on and off.

• They are always stronger.

• They are smaller in size.

• They are made of plastic.

What happens when a current flows through a wire?

• It makes the wire disappear.

• It turns the wire into a battery.

• It makes the wire glow.

• It creates a magnetic field.

How can the strength of a solenoid be increased?

• By using a plastic core.

• By adding more coils.

• By making the wire shorter.

• By decreasing the current.

What is the relationship between the current and the number of paperclips an electromagnet can pick up?

• More current means no paperclips.

• More current means fewer paperclips.

• Current does not affect paperclips.

• More current means more paperclips.

What can be controlled in an electromagnet?

• Its temperature and smell.

• Its size and weight.

• Its color and shape.

• Its strength and on/off state.