Current is not a thing in itself, it is a rate: the amount of charge sweeping past a point every second. Pin that down with a single equation and you can work out charge, current or time from the other two.
Current is the charge passing a point each second: I = Q divided by t. Rearranged, the charge delivered is Q = I multiplied by t, measured in coulombs. One ampere is one coulomb per second.
Current is the charge passing a point per unit time. So the charge is the current multiplied by the time.
Charge is measured in coulombs (C). One ampere equals one coulomb per second.
Vary the current and time and read off the charge that has flowed.
Four quick checks. Each correct answer earns XP and lights this skill on your star map.
Current is defined as...
The unit of electric charge is the...
The charge that flows is given by...
One ampere is the same as one...
From any two of charge, current and time you can find the third.
A current of 3.0 A flows for 20 s. Find the charge that passes.
Keep the relation the right way up: I = Q divided by t. To find the charge, multiply current by time, Q = I t. A coulomb is an ampere-second.
Unlocks once the four checks above are done. Worth more XP, written in the style of Paper 2.
A current of 3.0 A flows for 20 s. The charge that passes is...
A charge of 240 C passes a point in 60 s. The current is...
A current of 2.0 A delivers a charge of 30 C. The time taken is...
Charge flow is mapped. Keep the chain going.