The table gives the design of four electromagnets. Each electromagnet is made with the same wire. Which electromagnet produces the strongest magnetic field?
Table: The number of turns, the core material and the current for four electromagnets
| Electromagnet | Number of turns | Core material | Current in A |
|---|---|---|---|
| W | 400 | iron | 2.0 |
| X | 400 | plastic | 2.0 |
| Y | 200 | iron | 2.0 |
| Z | 200 | plastic | 4.0 |
W
X
Y
Z
39 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.