The table below gives data for four different electrical devices.
| Device | Voltage | Current |
|---|---|---|
| LED spotlight | 24 V | 1.5 A |
| soldering iron | 230 V | 0.25 A |
| neon sign transformer | 15 kV15\text{ kV}15 kV | 4.0 mA |
| laptop charger | 19 V | 3.5 A |
Which device develops the greatest power?
LED spotlight
soldering iron
neon sign transformer
laptop charger
69 exam-style questions on CIE IGCSE Physics 4.2.5 Electrical energy and electrical power. Each one has a worked solution and a mark scheme showing where the marks go.