PH-327
D.c. motor
Physics · Secondary 3 · Hard · D.c. motor
In a simple d.c. motor, the split‑ring commutator is accidentally replaced by two smooth slip rings so that the current in the coil no longer reverses. What will most likely happen to the motion of the coil when the supply is switched on?
- It will rock backwards and forwards about one position.
- It will spin steadily in the same direction as before.
- It will speed up and then keep rotating faster and faster.
- It will not move at all because no force acts on the coil.
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