4.If you are going to use alternating current to power a d.c. motor, what change should you make in the motor?
Remove the Split Ring and replace with two Slip Rings, one for each loop.
There would be no need for split rings to change the current direction since the current would already be changing its direction since it is alternating current.
The slip rings would be needed to ensure that the wires do not get tangled after one rotation.
The typical sine curve would no longer be formed. Instead the following DC graph would result, showing current flowing in ONE direction (one quadrant), but with changing magnitudes.