Electric Charge and Circuits

What are the two types of electric charge?

• Positive and magnetic

• Positive and negative

• Static and current

• High and low

What happens when two objects with like charges are brought close together?

• They attract

• They repel

• They neutralize

• They explode

What occurs when a charged object is brought near a neutral object?

• The neutral object gains heat

• The neutral object is attracted to the charged one

• Nothing happens

• They both repel

Which material is a good conductor of electricity?

• Plastic

• Rubber

• Copper

• Wood

Which of the following is an insulator?

• Glass

• Aluminum

• Steel

• Salt water

What does the law of conservation of charge state?

• Charge disappears during transfer

• Total charge remains constant in a system

• Charge changes form during a reaction

• Charge cannot be measured

What is the main purpose of a lightning rod?

• To attract lightning

• To safely direct electrical charge to the ground

• To store static electricity

• To power a circuit

How does a paint sprayer use static electricity?

• It charges paint particles so they stick evenly

• It uses magnets to attract paint

• It heats paint to increase flow

• It sprays using compressed air only

What is resistance?

• The amount of current in a circuit

• The opposition to the flow of electric current

• The number of electrons in a wire

• The power used in a circuit

What happens when a second identical lightbulb is added in series?

• The total resistance increases

• The current increases

• Each bulb gets brighter

• Voltage across each bulb increases