17. Adc motor with its rotor and field coils connected in series has an internal resistance of R. When the motor is running at full load on a supply of V, the emf in the rotor is . Which statement is not correct for this system?
(A) The current drawn by the motor from the supply is (V-ε )/R；
(B) The power delivered to the motor is V(V-ε )ε/R；
(C) The mechanical power developed by the motor is (V-ε) ε /R；
(D) All；
(E) None.