The table shows the resistivity, length and cross-sectional area of wires P and Q.
| Resistivity | Length | Cross-sectional area | |
|---|---|---|---|
| Wire P | ρ\rhoρ | LLL | AAA |
| Wire Q | 3ρ3\rho3ρ | LLL | 2A |
The resistance of wire P is RRR.
What is the total resistance of the wires when they are connected in parallel?
25R\frac{2}{5}R52R
35R\frac{3}{5}R53R
32R\frac{3}{2}R23R
52R\frac{5}{2}R25R
37 exam-style questions on AQA A Level Physics Current electricity, covering Basics of electricity, Current-voltage characteristics, Resistivity, Circuits, Potential divider, and Electromotive force and internal resistance. Each one has a worked solution and a mark scheme showing where the marks go.