Electricity & Magnets CFA

Which of the following describes an example of static electricity?

• When a switch is flipped, a light immediately turns on.

• A motor spins continuously because of electricity and magnetism.

• A radio plays music loudly even though it is not plugged into an outlet.

• A plastic comb attracts small pieces of paper after it is rubbed with another object.

What should Marcus predict will happen when he connects wire 3 to the paper clip?

• A. The battery will die.

• B. The light bulb will break.

• C. The light bulb will light up.

• D. The paper clip will turn black.

How do the wire and cover compare in their ability to conduct or insulate electricity?

• Both the wire and the cover are insulators.

• Both the wire and the cover are conductors.

• The wire is a conductor, and the cover is an insulator.

• The wire is an insulator, and the cover is a conductor.

Static electricity is the buildup of electric charges. Which of the following is an example of a natural discharge of static electricity?

• A. lightning

• B. ocean waves

• C. northern lights

• D. Earth's magnetic poles

What can Clay conclude from this observation?

• A. Object N is a magnet.

• B. Object O is a magnet.

• C. Object P is a magnet.

• D. Object M is a magnet.

Which of the following would be best to replace the ? in the table?

• a flashlight is turned on using a switch

• a computer cord is plugged into an outlet

• a battery-powered toy robot starts to move

• a plastic stick rubbed with wool attracts rice grains

Which of these is required to make a circuit?

• a light bulb

• a closed loop

• two batteries

• static electricity

The picture below shows an electric circuit. What carries electric energy through the circuit?

• the fan

• the wires

• the battery

• the light bulb

The diagram below shows a light bulb connected to a battery by a wire. What will happen to the light bulb?

• It will light up using energy from the battery.

• It will not light up because the battery is not charged.

• It will light up because the wire is electrically charged.

• It will not light up because a complete loop of wires is needed.

How are electromagnets the same as permanent magnets?

• They both use a coil of wire.

• They can both be turned off.

• They can only be made of plastic.

• They both have a north and south pole.