A student builds a small d.c. motor. The teacher provides the following equipment: battery; ammeter; voltmeter; coil of wire; magnets; resistor. The student may also use any other equipment if he wants to. Which pieces of equipment have to be used?
- Aammeter, battery and resistor
- Bammeter, coil of wire and voltmeter
- Cbattery, coil of wire and magnets
- Dmagnets, resistor and voltmeter