Electrical Machines If an induction machine is run at above the synchronous speed it acts as None of these an induction generator a synchronous motor an induction motor None of these an induction generator a synchronous motor an induction motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of rotation of 5th harmonic component in the stator of an induction motor is (1 / 15) times the synchronous speed. 0.5 times the synchronous speed. 5 times the synchronous speed. (1 / 5) times the synchronous speed. (1 / 15) times the synchronous speed. 0.5 times the synchronous speed. 5 times the synchronous speed. (1 / 5) times the synchronous speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will remains same. none of these. Decrease.d increase. remains same. none of these. Decrease.d increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors. Calculate the back emf produced when it is running at a speed of 1500 rpm. 220 volt. 230 volt. 240 volt. 440 volt. 220 volt. 230 volt. 240 volt. 440 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be Xd = 10.8Ω and Xq = 8Ω Xd = 8Ω and Xq = 10.8Ω Xd = 9.6Ω and Xq = 9Ω Xd = 9Ω and Xq = 9.6Ω Xd = 10.8Ω and Xq = 8Ω Xd = 8Ω and Xq = 10.8Ω Xd = 9.6Ω and Xq = 9Ω Xd = 9Ω and Xq = 9.6Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip speed is the difference of actual rotor speed and synchronous speed. sum of synchronous and rotor speeds. difference of synchronous speed and actual rotor speed. half of the sum of synchronous and rotor speeds. difference of actual rotor speed and synchronous speed. sum of synchronous and rotor speeds. difference of synchronous speed and actual rotor speed. half of the sum of synchronous and rotor speeds. ANSWER DOWNLOAD EXAMIANS APP
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