Electrical Machines If Pi and Pc represent core and full load copper loss respectively, the maximum KVA delivered to load corresponding to maximum efficiency is equal to rated KVA is Pi/Pc (Pi/Pc)2 √(Pi/Pc) Pc/Pi Pi/Pc (Pi/Pc)2 √(Pi/Pc) Pc/Pi ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A motor armature conductor of length 0.5 m is exposed to a flux density of 4 Wb / m2. Calculate the force experienced by the conductor, when the armature current is 5 Amp? None of these. 15 N. 20 N. Can't be determined. None of these. 15 N. 20 N. Can't be determined. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When pure inductive load is connected to the alternator, what is the effect of armature reaction? None of these Demagnetization Cross magnetization Magnetization None of these Demagnetization Cross magnetization Magnetization ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a 3-phase induction motor operating in its stable region decreases with increase in the load torque. increases with increase in the load torque. remains constant. decreases with decrease in the load torque. decreases with increase in the load torque. increases with increase in the load torque. remains constant. decreases with decrease in the load torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two generators operating in parallel with rating 50MW and 100MW respectively. Both their respective governor settings are identical as 4%, consider same no load frequency. How will the machine share a common load of 100 MW 33.33 MW and 66.67 MW respectively any of the above 66.67 MW and 33.33 MW respectively 50 MW and 50 MW respectively 33.33 MW and 66.67 MW respectively any of the above 66.67 MW and 33.33 MW respectively 50 MW and 50 MW respectively ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If an AC servomotor has one of its winding excited by AC, then voltage measured at the other winding with rotor running will be constant independent of speed. proportional to rotor speed. proportional to square of rotor speed. zero. constant independent of speed. proportional to rotor speed. proportional to square of rotor speed. zero. ANSWER DOWNLOAD EXAMIANS APP
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