Electrical Machines A frog leg winding is used in a DC machine to eliminate the use drum winding. the use of compensating winding. reactance voltage produced due to communication. the use equalizer in lap winding. the use drum winding. the use of compensating winding. reactance voltage produced due to communication. the use equalizer in lap winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 2 pole synchronous machine is operating at 3000 rpm. Find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm) ? ωe = 1/2*ωm ωe = ωm ωe = 2*ωm ωe = 4*ωm ωe = 1/2*ωm ωe = ωm ωe = 2*ωm ωe = 4*ωm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following bearings and their uses are correct roller bearings → large machines both A and B neither 1 nor 2 ball bearings → small machines roller bearings → large machines both A and B neither 1 nor 2 ball bearings → small machines ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because there was a break in the armature circuit field resistance was higher than critical resistance field winding was wrongly connected field system lost residual magnetism there was a break in the armature circuit field resistance was higher than critical resistance field winding was wrongly connected field system lost residual magnetism ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increase in speed of a DC motor back emf increases but line current falls. both back emf as well as line current fall. both back emf as well as line current increase. back emf falls and line current increases. back emf increases but line current falls. both back emf as well as line current fall. both back emf as well as line current increase. back emf falls and line current increases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following induction motor has maximum speed? 2 pole. 4 pole. 8 pole. 6 pole. 2 pole. 4 pole. 8 pole. 6 pole. ANSWER DOWNLOAD EXAMIANS APP
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