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Question
A flat coil ABCD is freely suspended between the pole pieces of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field. What happens when a current is passed in the coil?
A flat coil ABCD is freely suspended between the pole pieces of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field. What happens when a current is passed in the coil?
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Solution
The correct option is B The coil will experience a torque due to which it will rotate
Permanent magnet (PM) direct current converts electrical energy into mechanical energy through the interaction of two magnetic fields. One field is produced by a permanent magnet assembly, the other field is produced by an electrical current flowing in the coil through the commutator. These two fields result in a torque which tends to rotate the coil ABCD. As the coil turns, the current in the winding are commutated to produce a continuous torque output.
Thus, when current flows through a rectangular coil ABCD placed in between the poles of a permanent magnet, the magnetic force produces a torque which rotates the coil.
Permanent magnet (PM) direct current converts electrical energy into mechanical energy through the interaction of two magnetic fields. One field is produced by a permanent magnet assembly, the other field is produced by an electrical current flowing in the coil through the commutator. These two fields result in a torque which tends to rotate the coil ABCD. As the coil turns, the current in the winding are commutated to produce a continuous torque output.
Thus, when current flows through a rectangular coil ABCD placed in between the poles of a permanent magnet, the magnetic force produces a torque which rotates the coil.
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