Electrical Machines Hunting in a synchronous motor takes place when supply voltage fluctuates. motor is under loaded. when power factor is unity. when load varies. when supply voltage fluctuates. motor is under loaded. when power factor is unity. when load varies. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC machine is a conduction machine. none of above are correct. convection machine. both are correct. conduction machine. none of above are correct. convection machine. both are correct. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature voltage control is considered suitable for a DC motor driven at constant power. speed. current. torque. power. speed. current. torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 250 V DC generator in run at rated speed with no excitation. The open circuit voltage will be 250 V. about 100 V. zero. very small, say about 2 or 3 V. 250 V. about 100 V. zero. very small, say about 2 or 3 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following, voltage regulation may be zero or negative unity power factor All of these leading power factor lagging power factor unity power factor All of these leading power factor lagging power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A simple method of increasing the voltage of a DC generator is to increase the speed of shaft rotation. increase the number of turns in field coil. increase the source frequency. increase the number of turns in armature coil. increase the speed of shaft rotation. increase the number of turns in field coil. increase the source frequency. increase the number of turns in armature coil. ANSWER DOWNLOAD EXAMIANS APP
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