Electromagnets do NOT need electricity to work., True, False, The magnetic force of electromagnets can be changed., True, False, Which of the following electromagnet has the strongest magnetic force?, 50 coils, 100 coils, 150 coils, 200 coils, Increasing the number of coils ______ the magnetic force of the electromagnet., increase, decrease, Which of the followings make use of electromagnets? (You may choose more than one answer.), a crane lifting scrap metal, a crane lifting a car, iron, electric bell, The electromagnet can lift a car when the electricity is _____., on, off, When the electricity is _____, the magnetic force disappears and the car is unloaded., on, off, When the switch is pressed, the electromagnet produces _____ and attracts the hammer so that it strikes the bell., heat , light, sound, magnetic force.
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Electromagnet
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