Electromagnetism

How could you increase the strength of an electromagnet?

• increase the number of turns in the coil of wire

• use more current

• use a larger bar

• All of the above

Which ONE of the following is the correct option for the fill in the blank: wire, clapper, or magnets?

An electromagnet is stronger if there are more turns in the coils of _________.

Which ONE of the following is the correct option for the fill in the blank: solenoid, wire, or magnet?

An electromagnet is a _________ wrapped around a bar of iron or other ferromagnetic materials.

Electromagnets are the strongest of all magnets

• True

• False

A crane operator drops the cargo by turning off the electric current to the electromagnet.

• True

• False

Electromagnets can be controlled by controlling the electric current.

• True

• False

A solenoid is a coil of wire with electric current flowing through it, which gives it a magnetic field

• True

• False

An electromagnet is stronger if there is more current flowing through it.

• True

• False

In an electromagnet, turning the electric current on or off turns the magnetic field on or off.

• True

• False

Electromagnets are very weak

• True

• False