dc stands for direct current. This can be obtained from a battery or a rectified ac (alternating current ) supply.
Well that depends on the type of motor. DC motors use direct current DC and induction motors use alternation current AC.
dc motor
shunt type dc motor use in train fans
Bushes, with reference to DC motors is a brushed DC motor which is a motor that designed to run from a direct current (DC) power source. This type of motor is an internally committed electric motor.
What supplies a dc motor is not current, but voltage. Current is what flows in the circuit formed by the dc motor and for the charge. That current varies according to the resistance of the circuit.
dc series motors
dc series motor
A DC motor is an electric motor that runs on direct current (DC) electricity. A DC motor is designed to run on DC electric power. Two examples of pure DC designs are Michael Faraday's homopolar motor (which is uncommon), and the ball bearing motor, which is (so far) a novelty. By far the most common DC motor types are the brushed and brushless types, which use internal and external commutation respectively to reverse the current in the windings in synchronism with rotation.
It is DC or `direct current'.
The field current of a dc motor provides the magnetic field that allows the motor to develop a torque when current flows through the armature..
rectifierac motor - dc generator set
when a dc motor armature current is fluctuated in a range then it is call hunting in a d.c motor.