A student makes four resistors using different pieces of wire. The wires have different diameters and lengths, but are all made of the exact same material.
| Wire | Diameter / mm | Length / cm |
|---|---|---|
| A | 0.5 | 12 |
| B | 0.5 | 25 |
| C | 1.5 | 12 |
| D | 1.5 | 25 |
Which piece of wire will make the resistor with the smallest resistance?
Wire A
Wire B
Wire C
Wire D
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.