A resistor and a battery are connected in series. The value of the resistor is 50 Ω. The potential difference (p.d.) of the battery is 12 V. What is the current in the resistor?
0.24 A0.24\text{ A}0.24 A
4.2 A4.2\text{ A}4.2 A
12 A12\text{ A}12 A
600 A600\text{ A}600 A
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.