A student sets up an electrical circuit consisting of a battery, a switch, an ammeter, a lamp, and a 12 Ω12\ \Omega12 Ω resistor, all connected in a single loop by copper wires.
State whether the components in this circuit are connected in series or in parallel.
When the switch is closed, a current flows through the circuit. State the name of the charged particles that drift through the copper wire to constitute this current.
The current in the 12 Ω12\ \Omega12 Ω resistor is 0.50 A0.50\text{ A}0.50 A when the switch is closed. Calculate the potential difference (p.d.) across this resistor.
132 exam-style questions on CIE IGCSE Physics 4.2.4a Resistance. Each one has a worked solution and a mark scheme showing where the marks go.