Answer:
(C). Compass
Step-by-step explanation:
DC motor:
The DC motor converts electrical energy to mechanical energy.
When the electric current passes through a coil placed in a magnetic field, a torque is produced which causes the coil to rotate
The parts of dc motor are as follows :
Coil of wire:
The electric current passes through a coil.
Magnet:
Coil is placed between two magnets.
Brush :
The brush carries current to the armature.
Compass :
Compass is used to detect the direction using magnetic field. Compass is not required in DC motor.
Commutator :
In a DC motor, commutator is used to reverse the direction of the armature current in the brush zone so that the torque is exerted in same direction.
Therefore,
The compass is not a part of a DC motor.