Electrical Machines For a dc machine shunt resistance and armature resistance values are low and low high and high low and high high and low low and low high and high low and high high and low ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous speed of an induction motor will be increased by speed can not be increased. decreasing of frequency. increasing of frequency. increasing number of poles. speed can not be increased. decreasing of frequency. increasing of frequency. increasing number of poles. 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 to an AC source. to earth. in reverse. to a DC source. to an AC source. to earth. in reverse. to a DC source. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point. 43 Amp. 44.47 Amp. 33.33 Amp. 29 Amp. 43 Amp. 44.47 Amp. 33.33 Amp. 29 Amp. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load primary current in a transformer lags behind applied voltage somewhat less than 90à leads the applied voltage by exactly 90Â& lags behind applied voltage by exactly 90Â&am leads the applied voltage somewhat less than 90Ã& lags behind applied voltage somewhat less than 90à leads the applied voltage by exactly 90Â& lags behind applied voltage by exactly 90Â&am leads the applied voltage somewhat less than 90Ã& ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will Decrease.d increase. none of these. remains same. Decrease.d increase. none of these. remains same. ANSWER DOWNLOAD EXAMIANS APP
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