#2.7
explain why a series or parallel circuit is more appropriate for particular applications, including domestic lighting
#2.8
understand how the current in a series circuit depends on the applied voltage and the number and nature of other components
#2.9
describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how to investigate this experimentally
#2.10
describe the qualitative effect of changing resistance on the current in a circuit
#2.11
describe the qualitative variation of resistance of light-dependent resistors (LDRs) with illumination and thermistors with temperature
#2.12
know that lamps and LEDs can be used to indicate the presence of a current in a circuit
#2.13
know and use the relationship between voltage, current and resistance:
voltage = current × resistance
\(V = I × R\)
#2.14
know that current is the rate of flow of charge
#2.15
know and use the relationship between charge, current and time:
charge = current × time
\(Q = I × t\)
#2.16
know that electric current in solid metallic conductors is a flow of negatively charged electrons
#2.17
understand why current is conserved at a junction in a circuit
#2.18
know that the voltage across two components connected in parallel is the same
#2.19
calculate the currents, voltages and resistances of two resistive components connected in a series circuit
#2.20
know that:
- voltage is the energy transferred per unit charge passed
- the volt is a joule per coulomb.
#2.21
know and use the relationship between energy transferred, charge and voltage:
energy transferred = charge × voltage
\(E= Q × V\)