Electrical Machines The function of field regulator in a DC compound motor is to limit the armature current. none of above. vary the armature resistance. control field current. limit the armature current. none of above. vary the armature resistance. control field current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 5% 2% 25% 4% 5% 2% 25% 4% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC machine having P no of pole pairs Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for lap-winding ? PZL/4Sa² PZL/4SP² PZL/ 4Sa PZL/4S PZL/4Sa² PZL/4SP² PZL/ 4Sa PZL/4S ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What happens if fifth multiples of harmonics is given to induction motor? Either short circuit or open circuit occurs. It will rotates in normal operation. Fail to start. It will rotates in reverse direction. Either short circuit or open circuit occurs. It will rotates in normal operation. Fail to start. It will rotates in reverse direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines R1 is the resistance of the primary winding of the transformer. The turn ratio in terms of primary to secondary is K. Then the equivalent resistance of the primary referred to secondary is R1 /K² K²R1 K×R1 R1 /K R1 /K² K²R1 K×R1 R1 /K ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor, damper windings are provided on rotor shaft. None of these stator frame. pole faces. rotor shaft. None of these stator frame. pole faces. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS