Electricity, Magnetism

What will happen when these magnets are brought close together?

• They will attract each other.
• They will repel each other.
• Both magnets will turn to the left
• Both magnets will turn to the right

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In which of the following materials do charges to flow more easily?

• glass

• wool

• metal wires

• rubber mats

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Which of the following statements describes the interaction between magnetic poles?

• Like poles attract each other.

• Like poles repel each other, and opposite poles attract each other.

• Opposite poles repel each other.

• Like poles attract each other, and opposite poles repel each other.

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What creates a magnetic field?

• charged particles that do not move

• moving electric charges

• gravity

• an isolated magnetic pole

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How are fossil fuels used to generate electrical energy?

• Heat from burning fuel creates steam that spins a turbine.

• Heat from burning fuel spins magnets inside an electric motor.

• Heat from burning fuel causes an electric motor to produce a current.

• Heat from burning fuel creates steam that turns a transformer.

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A temporary magnet that only works when electricity is passed through wires surrounding an iron core is called:

• electromagnet

• galvanometer

• induction

• super conductor magnet

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The energy something has because it is moving

• kinetic energy
• potential energy
• magnetic energy
• force

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Can you produce current in a wire with a magnet that is sitting still?

• Yes; having a magnet near a wire is enough to excite the electrons

• No; the magnetic field has to be changing to excite the electrons

• No; magnets cannot create electricity

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What would happen if I move a bar magnet in and out of a coil of copper wire?

• Electric current would disappear 
• The magnet would explode 
• Electric current will flow through the wire
• It would produce a gravitational field

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What is electricity?

• an object that electrons do not flow through

• energy created by moving charged particles

• when two objects repel each other

• a circuit that has only one path for electricity to flow