Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5 Ω and back emf of 200 V is 40 A. 400 A. 440 A. 44 A. 40 A. 400 A. 440 A. 44 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following speed control of DC motor the speed obtained is below than the rated speed? Armature circuit resistance control. Field resistance control. Any of above. Armature voltage control. Armature circuit resistance control. Field resistance control. Any of above. Armature voltage control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is increased, the power factor is unity power factor None of these leading power factor lagging power factor unity power factor None of these leading power factor lagging power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Scott connections are used for single phase to three phase transformation. three phase to two phase transformation. three phase to single phase transformation. any of the above. single phase to three phase transformation. three phase to two phase transformation. three phase to single phase transformation. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following will vary the maximum torque? None of these rotor resistance R both 1 and 2 rotor reactance X None of these rotor resistance R both 1 and 2 rotor reactance X ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Number of slip rings in 3-phase synchronous motor will be 0 3 or 4 2 1 0 3 or 4 2 1 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS