Electromagnets

Electromagnets are

• permanent magnets.

• activated by electricity.

• magnetised within strong magnetic fields.

A force combining both electric and magnetic forces.

• Electromagnetism
• static magnetism
• magnoelectricism
• reverse magnetism

The power of a magnet is known as the __________ of that magnet.

• magnetic force
• electric force
• electromagnet
• static charge

The stronger the magnet, the larger the _________

• magnetic field
• magnetic box
• static charge
• sticking zone

This is an example of an

• electromagnet

• circuit breaker

• staticmagnet

• batterymagnet

Which of the following is NOT a way to make an electromagnet stronger?

• increase the number of loops of wire
• increase the current or voltage
• decrease the wire size
• change the type of core

Electromagnets are objects that act like magnets when an electrical current passes through them. The iron object becomes magnetised when the circuit is (a)  

Electromagnets are used in motors, generators, electric bells, hard disks and goggles.

• True

• False

In transport,................. trains use magnetic levitation to move without touching the ground.

• Maglev

• Steam

• Electrical

Magnets are also used for magnetic..................and for lifting heavy metal objects such as scrap and heavy metal parts of for construction.

• separation

• production

• imagination