Students should be able to:
- state that current is the rate of flow of charge and that it is measured in amperes
- distinguish between conventional current and electron flow
- recall and apply the relationship charge = current × time to new situations or to solve related problems
- state that the electromotive force (e.m.f.) of a source is the work done per unit charge by the source in driving charges around a complete circuit and that it is measured in volts
- calculate the total e.m.f. where several sources are arranged in series
- state that the potential difference (p.d.) across a component in a circuit is the work done per unit charge in driving charges through the component and that it is measured in volts
- state that resistance = p.d. / current
- apply the relationship R = V / I to new situations or to solve related problems
- recall and apply the relationship of the proportionality between resistance and the length and crosssectional area of a wire to new situations or to solve related problems
- describe the effect of temperature increase on the resistance of a metallic conductor
- sketch and interpret the I-V characteristic graphs for a metallic conductor at constant temperature (ohmic conductor), for a filament lamp and for a semiconductor diode.