Chapter 30: Electricity

What is electrical current?

• Flow/Movement of charges

• Flow/Movement of atoms

• The ability of charges to carry out a task

• The ability of atoms to carry out a task

What is potential difference (voltage)?

• Ability of electrons to move

• Resistance to current flow

What is electrical resistance?

• Opposition to the movement of electrons

• Flow of electrons

What kind of circuits are there?

• Series

• Parallel

• Both

Calculate the potential difference (voltage) across a resistor of resistance 10 Ω if the current flowing through it is 2 amperes.

• 20 volts

• 10 volts

• 20 amps

• 5 volts

What is the unit of electrical resistance?

• Ampere

• Volt

• Watt

• Ohm

Which law relates voltage, current, and resistance in an electrical circuit?

• Ohm's Law

• Newton's Law

• Kirchhoff's Law

• Faraday's Law

What is the unit of electrical current?

• Volt

• Ampere

• Watt

• Ohm

How does a parallel circuit differ from a series circuit?

• In a series circuit, components are connected across common points.

• In a parallel circuit, components are connected across common points.

• In a parallel circuit, components are connected end-to-end.

• There is no difference between parallel and series circuits.

Calculate the resistance flowing through a resistor when 220 volts is flowing through a circuit which has a current of 10 amps

• 22 Ω

• 22 V

• 22 A

• 2200 Ω