Physics for IGCSE & O level - Magnets And Currents (Section 11 - No. 31)
If the current flows in the same direction through the coil, what can happen?
The coil will continually rotate.
The coil will turn a small amount, and then stop.
The coil will not turn.
The direction of the current will change.
Forklaring
Without a device to reverse the current, the coil will only turn partially.