Electric Currents

What are electrons?

• Negatively charged subatomic particles

• Positively charged subatomic particles

• Neutrally-charged subatomic particles

• Negatively charged atoms

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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 bursts 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 lightning

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 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

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.

Tags

NGSS.MS-PS2-3

What might happen if wires weren't insulated?

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

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

• Current electricity would become static electricity.

• The circuit would be broken.

Which of the following is an example of a load?

• electrical outlet

• battery

• wires

• toaster oven

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