PHYSICS · Single correct · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
During a school experiment, one segment of the split-ring commutator of a battery-operated DC motor gets jammed and fails to reverse the current in the coil. The battery and the rest of the circuit remain connected. Which of the following is the most probable outcome immediately after the coil completes the next half-turn?
(a) The coil will continue to rotate at nearly the same speed without any noticeable change.
(b) The coil will come to rest with its plane parallel to the magnetic field lines.
(c) The coil will come to rest with its plane perpendicular to the magnetic field lines.
(d) The coil will start acting as a generator, sending current back to the battery and charging it.