Electric Circuits

What are electrons?

• Negatively charged subatomic particles

• Positively charged subatomic particles

• Neutrally-charged subatomic particles

• Negatively charged atoms

Which word best describes electricity as it occurs in nature?

• Orderly

• Stationary

• Sudden

• Powerless

Why is static electricity not useful as a power source?

• Because electrons aren't transferred in burst of static electricity.

• Because ALL energy is released at once in static electricity.

• Because static electricity is not a real form of electricity.

• Because static electricity only occurs in lightening.

What is a current?

• A steady flow of electricity.

• A short burst of electricity.

• A wire along which electricity flows.

• A power source that supplies electricity.

What is the function of a power source in a circuit?

• It provides a steady source of static electricity.

• It provides a way for the circuit to be broken.

• It provides a path along which the electricity can flow.

• It provides a steady flow of electrons.

How does rubber differ from most metals?

• Rubber is a good conductor. Most metals are good insulators.

• Rubber conducts electrons. Most metals conduct protons.

• Rubber is a good insulator. Most metals are good conductors.

• Rubber is a good power source. Most metals are good conductors.

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What might happen if wires weren't insulated?

• The power source would no longer provide a source of electrons.

• We'd be in danger of harm from electric shocks.

• Current electricity would become static electricity.

• The circuit would be broken.

Which of the following is an example of a load?

• 
• 
• 
• 

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What device opens and closes an electric circuit?

• a switch

• a power source

• a load

• a current

What happens if you disconnect a circuit from its positive terminal?

• The electrons shoot out from the negative terminal.

• The electrons stop flowing, and the current stops.

• The current reverses direction.

• Nothing happens.