Electrical current transfers energy around circuits. There are two types of current: direct and alternating.

Part of

A current of 1.5 A flows through a simple electrical circuit.

How many coulombs of charge flow through a point in 60 seconds?

Q = It

I = 1.5 A

t = 60 s

Q = 1.5 A x 60 s

Q = 90 C

The quantity of charge flowing through a point in 60 s is 90 C.

- Question
How much charge has moved past a point in a circuit if a current of 13 A flows for 10 s?

Q = It

I = 13 A

t = 10 s

Q = 13 A x 10 s

Q = 130 C

The quantity of charge flowing past a point in the circuit in 10 s is 130 C.

- Question
How much current flows when 10 C passes down a wire in 2 s?

I =

Q = 10 C

t = 2 s

I =

I = 5 A

The current flowing is 5 A.