I haven't looked the definitions up since revision for PHYA1, the January exam (E grade)
Current: Rate of flow of charge, Charge/Second
Charge: 1A (is almost like the mole in chemistry, 1 Electron has a charge -1.6x10-19, 1 Ampere must be due to 6.25x1018 electrons.
Potential difference: The driving force of the circuit? The work done by the electron per unit of charge... So pd is the desire to move around the circuit?
(pd, 0-5 the circuit has a pd of 5 and the electron will deliver less energy?
V = W/Q
So pd x charge = energy transfer?
What do you wish you'd been taught?