A student replaces the split-ring of a battery-operated motor with two continuous…
PHYSICS · Single correct · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
A student replaces the split-ring of a battery-operated motor with two continuous metal rings while keeping the DC supply unchanged. What is the most likely behaviour of the coil when the current is switched on?
(a) It will rotate continuously in one direction at the same speed.
(b) It will not rotate at all because the circuit becomes open.
(c) It will oscillate back and forth about its initial position instead of rotating continuously.
(d) It will rotate continuously but at half the speed as before.