Electricity Review

What is the SI unit for resistance in an electrical circuit?

• Ampere

• Ohm

• Volt

• Coulomb

If the voltage difference in a circuit is 12 volts and the resistance is 4 ohms, what is the current?

• 2 amperes

• 3 amperes

• 6 amperes

• 48 amperes

Which describes the difference between a series and parallel circuit?

• Series circuits have a single path for current flow, while parallel circuits have multiple paths.

• Parallel circuits have a single path for current flow, while series circuits have multiple paths.

• Both series and parallel circuits have multiple paths for current flow.

• Both series and parallel circuits have a single path for current flow.

Give an example of a conductor and an insulator and explain why they are classified as such.

• Conductor: Glass; Insulator: Copper

• Conductor: Copper; Insulator: Rubber

• Conductor: Plastic; Insulator: Steel

• Conductor: Wood; Insulator: Aluminum

Why are household circuits generally arranged in parallel instead of in series?

• To ensure each device gets maximum resistance

• To allow multiple devices to operate independently

• To save electricity by dividing current equally

• To avoid tripping circuit breakers

What natural phenomenon is caused by a large discharge of static electricity, and how does this relate to the buildup and movement of electric charges?

• Tornadoes

• Lightning

• Earthquakes

• Rainbows

Tags

NGSS.MS-PS2-3

What is the difference between an open circuit and a closed circuit?

• An open circuit allows current to flow, while a closed circuit does not.

• A closed circuit allows current to flow, while an open circuit does not.

• Both open and closed circuits allow current to flow.

• Neither open nor closed circuits allow current to flow.

What material is considered the best conductor?

• Metals

• Non-metals

• Metalloids

• Diatoms

True or False: The flow of electric charge (current) is measured in volts.

• True

• False

Which of the following correctly describes the charge & location of protons, neutrons, & electrons?

• Protons are positive and in the nucleus; electrons are negative and outside the nucleus; neutrons are neutral and in the nucleus.

• Protons are negative and outside the nucleus; electrons are positive and in the nucleus; neutrons are neutral and outside the nucleus.

• Protons are neutral and outside the nucleus; electrons are negative and in the nucleus; neutrons are positive and in the nucleus.

• Protons are positive and outside the nucleus; electrons are neutral and in the nucleus; neutrons are negative and in the nucleus.