The diagram shows a basic d.c. motor. The switch is switched on and the coil turns. Which change causes the coil to turn in the opposite direction and at a higher rate?
- Aincrease the current in the coil and increase the number of turns in the coil
- Breverse both the magnetic field and the current in the coil
- Creverse the magnetic field and decrease the current in the coil
- Dreverse the magnetic field and increase the current in the coil