What happens if the primemover of an alternator is removed after connecting to the infinity busbar? - Explain with necessary diagrams.

Explain the operation of three phase induction machine. (Not too long). Define slip.

19. What causes sparking at the brushes ? (DC GENERATOR QUESTION)

How do power transformers work in electrical power distribution?

The reactance’s of the alternator  during the periods of the subtransient, transient and steady state periods are following, Leakage reactance(XL)=0.13 ohm, Damper winding reactance(XD)= 0.27 ohm     Field winding reactance(Xf)=0.54 ohm and   Armature reactance (Xm)= 0.73 ohm. The value of the  transient reactance  during the  transient  conditions is                                                                        Transient Reactance

Any chooses is correct?

DC/AC MOTOR (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS LEGIBLY. NO LONG EXPLANATIONS NEEDED. ANSWER IN 2 DECIMAL PLACES. BOX THE FINAL ANSWER.)

READ THE PROBLEM AND JUST DRAW CIRCUIT DIAGRAM. NO NEED TO SOLVE ANYTHING. A short shunt compound generator delivers 150A at a terminal voltage is 230V.The shunt field current is 2.5A. The resistances of the armature, series field and diverterare 0.032 ohm, 0.015 ohm and 0.03 ohm respectively. Calculate the electrical efficiencyof the generator at this load. Modify the circuit diagram on the picture based on the problem. Answer: 95.7%

ii)Conduct suitable tests to measure the copper loss occurs in a three phase Induction Motor.

How do transformers facilitate voltage transformation in power transmission?