Two straight sections of insulated cable are laid beneath a workshop floor. Direct current flows through each cable. A magnetic field meter is placed on the floor directly above each cable.
| Cable | Current through cable in A | Distance from cable to meter in m |
|---|---|---|
| P | 12 | 0.15 |
| Q | 20 | 0.08 |
The magnetic field meter records a stronger magnetic field above cable Q than above cable P.
Give two reasons why the magnetic field is stronger above cable Q.
90 exam-style questions on AQA GCSE Physics 7.2 The motor effect, covering 7.2.1 Electromagnetism, 7.2.2 Fleming's left-hand rule (HT only), 7.2.3 Electric motors (HT only), and 7.2.4 Loudspeakers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.