Four students are each given an identical resistor and asked to find its resistance. They each measure the potential difference across the resistor and the current in it.
One student makes a mistake.
Which row shows the results of the student that makes a mistake?
| Potential difference / V | Current / A | |
|---|---|---|
| A | 2.0 | 0.40 |
| B | 3.5 | 0.70 |
| C | 4.5 | 0.80 |
| D | 5.5 | 1.10 |
Row A
Row B
Row C
Row D
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.