Electrical Machines The DC generator runs at a speed of 1000 rpm and flux per pole is 0.2 Wb, number of poles are 2 the winding is wave wound and having 480 conductors. The critical speed is 1200 rpm. Then the generated emf ( Eg ) 2000 Volt. 0 Volt. 1500 Volt. 1600 Volt. 2000 Volt. 0 Volt. 1500 Volt. 1600 Volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding results in reduced axial length of the machine. results in reduced leakage reactance. make it stiffer. All of these results in reduced axial length of the machine. results in reduced leakage reactance. make it stiffer. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On which of the following factor/factors the speed of a DC motor depends upon? All of these. Armature current. Applied voltage. Field flux. All of these. Armature current. Applied voltage. Field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop induction generator torque. synchronous motor torque. DC motor torque. induction motor torque. induction generator torque. synchronous motor torque. DC motor torque. induction motor torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC shunt motor if load is reduced The speed will increase in proportion to reduction in load. The speed will increase abruptly. The speed will remains almost constant. DC Shunt Motor The speed will increase in proportion to reduction in load. The speed will increase abruptly. The speed will remains almost constant. DC Shunt Motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively 14.28 and 9.60 Ω. 8.248 and 5.54 Ω. 14.28 and 5.54 Ω. 8.248 and 9.60 Ω. 14.28 and 9.60 Ω. 8.248 and 5.54 Ω. 14.28 and 5.54 Ω. 8.248 and 9.60 Ω. ANSWER DOWNLOAD EXAMIANS APP
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