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% 4% 25% 2% 5% 4% 25% 2% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The demagnetising component of armature reaction in a DC generator reduces generator emf. results in sparking trouble. increases armature speed. reduces inter poles flux density. reduces generator emf. results in sparking trouble. increases armature speed. reduces inter poles flux density. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? generator 2 gets over load 200 MW and 400MW respectively 230.7 MW and 369.23 MW respectively generator 1 gets over load generator 2 gets over load 200 MW and 400MW respectively 230.7 MW and 369.23 MW respectively generator 1 gets over load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Variation in speed by ward-Leonard control of DC motors occurs due to variation in Supply voltage. Armature voltage. Field excitaion. Armature current. Supply voltage. Armature voltage. Field excitaion. Armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator? Equalizer rings. Commutator. Dummy coils. Eye bolt. Equalizer rings. Commutator. Dummy coils. Eye bolt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, the frequency of a voltage at the secondary is any of the above. greater than the primary. equal to primary. less than primary. any of the above. greater than the primary. equal to primary. less than primary. ANSWER DOWNLOAD EXAMIANS APP
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