Principles of Electricity

Electricity is the movement of electrons from one atom to another.

• True

• False

What unit of electricity measures the amount of current ?

• Volts

• Coulomb

• Ampere

• Ohm's

Which of the following is a unit of electrical pressure.

• Ampere

• Volt

• Ohm

• Coulomb

What is a device used to protect circuits from an overload of current?

• fuse

• hot wire

• isulator

• neutral wire

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.

Tags

NGSS.MS-PS3-5

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 from electric shocks.
• Current electricity would become static electricity.
• The circuit would be broken.

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

What device opens and closes an electric circuit?

• A switch
• A power source
• A load
• A current