#P3.2.1
recall that current is a rate of flow of charge, that for a charge to flow, a source of potential difference and a closed circuit are needed and that a current has the same value at any point in a single closed loop
#P3.2.2
recall and use the relationship between quantity of charge, current and time:
charge (C) = current (A) × time (s)
#P3.2.3
recall that current (I) depends on both resistance (R) and potential difference (V) and the units in which these quantities are measured
#P3.2.4
a) recall and apply the relationship between I, R, and V, to calculate the currents, potential differences and resistances in d.c. series circuits:
potential difference (V) = current (A) × resistance (Ω)
b) describe an experiment to investigate the resistance of a wire and be able to draw the circuit diagram of the circuit used
PAG7
#P3.2.5
recall that for some components the value of R remains constant (fixed resistors) but that in others it can change as the current changes (e.g. heating elements, lamp filaments)
#P3.2.6
a) use graphs to explore whether circuit elements are linear or non-linear and relate the curves produced to their function and properties
b) describe experiments to investigate the I-V characteristics of circuit elements. To include: lamps, diodes, LDRs and thermistors. Be able to draw circuit diagrams for the circuits used
PAG6
#P3.2.7
represent circuits with the conventions of positive and negative terminals, and the symbols that represent common circuit elements, filament lamps, diodes, LDRs and thermistors, switches and fixed and variable resistors