Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 205 V. 210 V. 212 V. 201.02 V. 205 V. 210 V. 212 V. 201.02 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip test is performed to determine slip All of these positive sequence reactance and negative sequence reactance direct axis reactance and quadrature axis reactance slip All of these positive sequence reactance and negative sequence reactance direct axis reactance and quadrature axis reactance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately-excited DC generator, running at rated speed, has 6 volts across its armature terminals with no field current. When field winding is excited with one ampere, the voltage builds up to 250 V at no load. In case field current is reduced to zero, with the speed remaining unaltered, the armature terminal voltage would be zero less than 6 V 6 V more than 6 V zero less than 6 V 6 V more than 6 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC motor can be determent by Flemings right hand rule. Flemings left hand rule. Amperes law. Lenzs law. Flemings right hand rule. Flemings left hand rule. Amperes law. Lenzs law. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the increase in the torque expressed as percentage of initial torque, if current drawn by the dc series motor is increased from 10A to 11A? 11% 21% 10% 41% 11% 21% 10% 41% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which DC motor will have least percentage increase of input current, for the same percentage increase in the torque DC Shunt Motor Separately Excited DC Motor DC Series Motor Compound Wound DC Motor DC Shunt Motor Separately Excited DC Motor DC Series Motor Compound Wound DC Motor ANSWER DOWNLOAD EXAMIANS APP
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