Electrical Machines The output voltage of a DC generator is E = V + Ra. E = V + IaRa. E = V + Ia. E = V – IaRa. E = V + Ra. E = V + IaRa. E = V + Ia. E = V – IaRa. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuit test is performed on a transformer with a certain impressed voltage at rated frequency. If the short circuit test is now performed with the same magnitude of impressed voltage, but at frequency higher than the rated frequency then The magnitude will both increase. The magnitude of current will decrease but the power factor will increase. The magnitude of circuit as well as the power factor will decrease. The magnetude of current will increase, but power factor will decrease. The magnitude will both increase. The magnitude of current will decrease but the power factor will increase. The magnitude of circuit as well as the power factor will decrease. The magnetude of current will increase, but power factor will decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a fault at the terminal of a synchronous generator, the fault current is maximum for a line to line fault. 3 - phase fault. 3 - phase to ground fault. line to ground fault. line to line fault. 3 - phase fault. 3 - phase to ground fault. line to ground fault. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A large series motor is never started without some mechanical on it because otherwise it will Develop excessive speed and damage itself. Produce sparking at brushes. Open fuse or circuit breaker. Draw too much current. Develop excessive speed and damage itself. Produce sparking at brushes. Open fuse or circuit breaker. Draw too much current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip test is performed to determine slip positive sequence reactance and negative sequence reactance All of these direct axis reactance and quadrature axis reactance slip positive sequence reactance and negative sequence reactance All of these direct axis reactance and quadrature axis reactance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ induction motor draws an current of 50 A from mains when starts by direct switching. If an auto transformer with 60 % tapping is used for starting the current drawn from the mains will be 18. 80. 50. 36. 18. 80. 50. 36. ANSWER DOWNLOAD EXAMIANS APP
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