Question

Eva makes a graphic organizer to compare electromagnets with solenoids.
Which description belongs in the region marked X?

A) has a magnetic field like a bar magnet
B) has a metal core
C) uses electromagnetic induction
D) uses an electric current

Answer 1

The description that belongs in the region marked X; B) has a metal core

Answer 2

Answer;

B) has a metal core

Explanation;

• A solenoid refers to a cylindrical coil of wire that has a diameter which is smaller than its length. When an electric current flows through the wire the solenoid generates a magnetic field similar to that of a bar magnet. An electromagnet is a solenoid wound around a central iron core.
• The solenoid becomes an electromagnet when a current flows through it.  An electromagnet is a solenoid wound around a central iron core.
• Both solenoids and electromagnets use electric current and coiled wires to produce strong magnetic fields.