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.
452 exam-style questions on CIE IGCSE Physics 4.2 Electrical quantities, covering 4.2.1a Positive and negative charge, 4.2.1b Charging by friction and detecting charge, 4.2.1c Electrical conductors and insulators, 4.2.1d Electric fields and electric field patterns, 4.2.2a Electric current, charge and measuring current, 4.2.2b Conduction in metals and the direction of current, 4.2.2c Direct current and alternating current, 4.2.3a Electromotive force, 4.2.3b Potential difference and voltmeters, 4.2.4a Resistance, 4.2.4b Resistance of a metallic wire, 4.2.4c Current–voltage graphs, and 4.2.5 Electrical energy and electrical power. Each one has a worked solution and a mark scheme showing where the marks go.