d.c. source
armature input
motor input
supply lines
Answer is Wrong!
Answer is Right!
The correct answer is: B. armature input
The rotor copper losses in a synchronous motor are met by the armature input. The armature is the part of the motor that rotates, and it is made up of a number of copper windings. When current flows through these windings, they create a magnetic field that interacts with the magnetic field of the stator, which causes the rotor to rotate. The amount of current that flows through the armature windings is determined by the motor’s load. When the motor is under a heavy load, more current flows through the windings, and the rotor copper losses increase.
The other options are incorrect because:
- A. d.c. source: The d.c. source provides power to the stator windings, not the rotor windings.
- C. motor input: The motor input is the total power that is supplied to the motor. This power is divided between the stator copper losses, the rotor copper losses, and the mechanical output of the motor.
- D. supply lines: The supply lines provide power to the motor, but they do not directly affect the rotor copper losses.