Electrical Machines The speed regulation of a DC motor is given as (NnL − NfL)/NfL. NnL/NfL. (NfL − NnL)/NnL. NnL − NfL. (NnL − NfL)/NfL. NnL/NfL. (NfL − NnL)/NnL. NnL − NfL. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, the frequency of a voltage at the secondary is less than primary. equal to primary. greater than the primary. any of the above. less than primary. equal to primary. greater than the primary. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following statements are correct ? Both 1 and 2. The leakage reactance of the induction motor should be small. None of these A small value of leakage reactance will increase the maximum power output of motor. Both 1 and 2. The leakage reactance of the induction motor should be small. None of these A small value of leakage reactance will increase the maximum power output of motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field in reverse. to a DC source. to an AC source. to earth. in reverse. to a DC source. to an AC source. to earth. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a DC cummulative compound wound motor is loaded Both torque and speed decrease. Torque decrease and speed increases. Torque increase and speed decrease. Torque and speed both increase. Both torque and speed decrease. Torque decrease and speed increases. Torque increase and speed decrease. Torque and speed both increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to f2 V f V2 f2 V f V2 ANSWER DOWNLOAD EXAMIANS APP
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