Electromagnetism

Electromagnets are

• permanent magnets.

• activated by electricity.

• magnetised within strong magnetic fields.

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A force combining both electric and magnetic forces.

• Electromagnetism
• static magnetism
• magnoelectricism
• reverse magnetism

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

• magnetic force
• electric force
• electromagnet
• static charge

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The stronger the magnet, the larger the _________

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

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This is an example of an

• electromagnet

• circuit breaker

• staticmagnet

• batterymagnet

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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

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

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

• True

• False

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

• Maglev

• Steam

• Electrical

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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

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