Electricity

Which best describes a simple series circuit?

• Electricity flows along one pathway.
• The flow of electricity comes from the switch.
• Electricity flows along many pathways.
• The flow of electricity comes from the light bulb.

What will happen if one light bulb is removed from this circuit?

• The other bulbs will go out.
• The other bulbs will get brighter.
• The other bulbs will get dimmer.
• The battery will become stronger.

Which of the following is NOT part of an electromagnet?

• Wire
• Iron
• Toothpick
• Power source

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

Why can you get a shock if you touch a metal doorknob after walking across a wool carpet?

• You have gained electrons; the doorknob has no electrons.
• You have gained neutrons; the doorknob has fewer electrons.
• You have lost electrons; the doorknob has many electrons.
• You have gained electrons; the doorknob has many electrons.

Why are metals useful for making electrical wire?

• Metals do not bend.
• Metals hold much heat.
• Metals are insulators.
• Metals are conductors.

Which of these causes electrically charged objects to attract or repel each other?

• An equal number of protons.
• An equal number of electrons.
• An unequal number of electrons.
• An unequal number of molecules.

Which best describes a parallel circuit?

• Electricity flows along one pathway.
• The flow of electricity comes from more than one source.
• Electricity flows along more than one pathway.
• The flow of electricity comes from more than 1 load.

Which of the following is shown in the picture?

• Electromagnet
• Electric generator
• Electric motor
• Transformer

The picture shows an electrical circuit. This circuit is a series circuit because: 

• It has 3 light bulbs.
• The same current flows through all three light bulbs.
• It uses a single battery.
• The electrical current is divided between the three light bulbs.