Electrical Machines Series booster is a permanent magnet DC generator. series wound DC generator. separately excited DC generator. shunt wound DC generator. permanent magnet DC generator. series wound DC generator. separately excited DC generator. shunt wound DC generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is 40 V 20 V zero 50 V 40 V 20 V zero 50 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when driven without any excitation, showed an open circuit voltage of 12 V. When the field winding was excited, the voltage dropped to zero. It happened because there was a break in the armature circuit there was no residual magnetism in the field circuit field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit there was no residual magnetism in the field circuit field resistance was higher than critical resistance field winding was wrongly connected ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become double. 4 times. half. one fourth. double. 4 times. half. one fourth. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of a dc motor the ratio Eb / E is indicative of ratio of starting to running current. efficiency. ratio of input to output voltage. ratio of starting to running torque. ratio of starting to running current. efficiency. ratio of input to output voltage. ratio of starting to running torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an alternator, voltage drops occurs in armature resistance, leakage reactance and armature reaction. armature resistance and leakage reactance. armature resistance, leakage reactance, armature reaction and earth connection. armature resistance only. armature resistance, leakage reactance and armature reaction. armature resistance and leakage reactance. armature resistance, leakage reactance, armature reaction and earth connection. armature resistance only. ANSWER DOWNLOAD EXAMIANS APP
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