A student replaces the split-ring commutator of a model DC motor with two continuous…
PHYSICS · Subjective · GCSE · Physics · Magnetism and Electromagnetism · Magnetism and Electromagnetism
Problem
A student replaces the split-ring commutator of a model DC motor with two continuous metal slip rings while keeping every other part unchanged.
Predict:
(i) the type of current (DC or AC) that will now be obtained from the external circuit connected to the rotating coil,
(ii) whether the coil will still rotate steadily, and
(iii) give one reason for each prediction.