Circuits and electricity

Question 1

What is current?

Answer 1

• A measure of the flow of electrons around a circuit
• Measured in amperes (A)
• Shown using an I

Question 2

What is potential difference?

Answer 2

• The amount of energy transferred per coulomb of charge
• Measured in voltage (V)

Question 3

What is resistance?

Answer 3

• Anything that opposes the flow of electrons around a circuit
• Measured in ohms
• Shown using an R

Question 4

What is charge?

Answer 4

• The total current that flowed in a circuit ina certain period of time
• Measured in coulombs (C)
• Shown using a Q
• Q = I x T (time measured in seconds)