Electrical current transfers energy around circuits. There are two types of current: direct and alternating.
Part of Combined ScienceElectricity
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.
How much charge has moved past a point in a circuit if a current of 13 A flows for 10 s?
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.
How much current flows when 10 C passes down a wire in 2 s?
I = \(\frac{\text{Q}}{\text{t}}\)
Q = 10 C
t = 2 s
I = \(\frac{\text{10 C}}{\text{2 s}}\)
I = 5 A
The current flowing is 5 A.