(Solved): (4 marks) The diagram below shows a simple motor. The loop of wire is attached to the split-ring co ...

(4 marks) The diagram below shows a simple motor. The loop of wire is attached to the split-ring commutator. a. Does the current flow through the wire from A-B or from B-A? b. The current running through the loop will cause it to spin. Will this cause point A to move up or down? How do you know? c. What is the purpose of the split-ring commutator and why must it be used on the motor for it to work properly?