Main aims
Students will:
describe current as a rate of flow of electric charge: I = ΔQ/Δt
give examples of charge carriers in different conductors
use flow analogies for current: e.g. water circuit, traffic etc.
relate current to microscopic charge flow: I = nAqv
use ammeters correctly
describe sources of electrical energy (cells, batteries etc.) as electrical ‘pumps’
use energy analogies - e.g. relating potential difference to changes in height and gravitational potential energy
give examples of energy transfers (heating effect - filament lamp and kettle)
define the volt using V = ΔW/ΔQ, 1 V = 1 J C-1
use voltmeters correctly
calculate work, energy and power in electric circuits P = IV