Electrical Machines Find the synchronous reactance of alternators in which a given field current of 200 A on short circuit and a generated emf of 50 V on open circuit. Armature resistance is 0.1 ohm 0.5Ω. 0.25Ω. 0.23Ω. 1Ω. 0.5Ω. 0.25Ω. 0.23Ω. 1Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The volt-ampere euation for a long-shunt compound motor is given by Vt= Ea– Iara Vt = Ea + Ia(ra + rs) Vt= Ea + Iara Vt = Ea + Iara+ ILrs Vt= Ea– Iara Vt = Ea + Ia(ra + rs) Vt= Ea + Iara Vt = Ea + Iara+ ILrs ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the residual magnetism is of the order of 20 %. 2.5 %. 15 %. 10 %. 20 %. 2.5 %. 15 %. 10 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V. 220 V. 225 V. 230 V. 222 V. 220 V. 225 V. 230 V. 222 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated) changes to 0.5 times the original value remain the same as the original changes to 1.5 times the original value changes to three times the original value changes to 0.5 times the original value remain the same as the original changes to 1.5 times the original value changes to three times the original value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 6 pole lap connected DC generator with 480 conductors has armature resistance of 0.06 Ω. If the conductors are reconnected to from a wave winding other things remaining unchanged, the value of armature resistance will be 0.54 Ω. 0.54 Ω. 0.01 Ω. 0.06 Ω. 0.54 Ω. 0.54 Ω. 0.01 Ω. 0.06 Ω. ANSWER DOWNLOAD EXAMIANS APP
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