Electricity

Resistance

Potential Dividers

I/GCSE / A Level

Definition of Electrical Current $$I=\frac{Q}{t}$$

(AKA Conventional Current)
(from simple.wikipedia.org)

where
$I$ is the electrical current in amps, $A$,
$Q$ is the charge that is moving in coulombs, $C$,
and
$t$ is the time taken for the follow ot occur in seconds, $s$.

• Kirchhoff's Current Law, and Kirchhoff's e.m.f and p.d. Law from isaacphysics.org;
  
• See electron flow from alevelphysics.co.uk.