Brainpop Electricity

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

• The electrons stop flowing, and the current stops.
• The current reverses direction.
• Nothing happens
• The electrons shoot out from the negative terminal.

What might happen if wires weren't insulated?

• The circuit would be broken.
• Current electricity would become static electricity.
• We'd be in danger of harm from electric shocks.
• The power source would no longer provide a flow of electrons.

What device opens and closes an electric circuit?

• a current
• a load
• a power source
• a switch

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

• It provides a means through which the circuit can be broken.
• It provides a path along which the electricity can flow.
• It provides a steady flow of electrons.
• It provides a steady source of static electricity.

Why is static electricity not useful as a power source?

• Because static electricity occurs only in lightning
• Because all energy is released at once in static electricity
• Because electrons aren't transferred in bursts of static electricity
• Because static electricity isn't a real form of electricity

How does rubber differ from most metals?

• Rubber conducts electrons; most metals conduct protons
• Rubber is a good conductor; most metals are good insulators
• Rubber is a good power source; most metals are good conductors
• Rubber is a good insulator; most metals are good conductors

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What is a current?

• A power source that supplies electricity.
• A wire along which electricity flows.
• A short burst of electricity
• A steady flow of electricity

Which of the following items is an example of a load?

• a wall outlet
• a battery
• a toaster
• a circuit

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What do fuel cells, batteries, and solar cells have in common?

• They all produce static electricity
• They are all sources of direct current
• They are all sources of alternating current
• They can all be used to power automobiles

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What is one possible reason why it's a good idea to conserve electricity?

•  It is often produced by burning fossil fuels, which are a polluting, non-renewable resource
• Power companies only give each home a limitedamount of electricity every day
• Using too much electricity can start dangerous electrical fires
• Using too much electricity can cause power plants to break down

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