Magnets and Electricity

A magnet that keeps its magnetism once removed from magnetic field.

• Electromagnet

• Electric Motor

• Generator

• Permanent Magnet

The flow of electric charges along a path.

• Static Electricity

• Electric Current

• Electron

• Proton

A device that changes (converts) mechanical energy into electrical energy.

• Generator

• Electric Motor

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A device that changes (converts) electrical energy into mechanical energy.

• Electric Motor

• Generator

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A ____________ is what happens when opposite charges quickly move back together.

• flow

• water

• spark

• balloon

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An object that is pulled toward a magnet is ______________ to the magnet

• attracted

• repelled

• afraid

• glued

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Which of the following materials is commonly used to make the core of an electromagnet?

• Copper

• Plastic

• Iron

• Wood

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What is the primary function of a transformer in an electrical circuit?

• To convert AC to DC

• To increase or decrease voltage

• To store electrical energy

• To measure electrical current

Which of the following devices is used to measure electric current?

• Voltmeter

• Ammeter

• Ohmmeter

• Thermometer

What happens to the magnetic field of a wire when the electric current through it is increased?

• The magnetic field decreases

• The magnetic field increases

• The magnetic field remains the same

• The magnetic field disappears

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