1. Electric Current and Energy
Key concepts
You should be able to describe and calculate current using I = q / t
You should be able to describe and calculate voltage using V = E / q

2. What is a Coulomb?
A Coulomb is a unit used to measure the amount of charge.
One electron has a charge of -1.6x10-19 C
How many electrons are contained in the following charges:
-6.4x10-19 C
-4.8mC
3.2x10-19 C
1C of negative charge

3. Calculating Electric Current I = q / t
Current (I, measured in Amps, A) equals charge (q) in Coulombs (C) per second
So, 1 Amp = 1 C/s
How many electrons will flow past an ammeter in one second with a current of 1 A?
How long will it take 360 Coulombs of charge to flow through a circuit where the current is 500mA?