Electrical Machines An ideal synchronous motor has no starting torque because rotor winding is highly reactive. rotor is made up of salient poles. relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. rotor winding is highly reactive. rotor is made up of salient poles. relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field? Zero Slip speed Synchronous speed None of these Zero Slip speed Synchronous speed None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1.0 Ω and armature current is 10 A. of the excitation of the machine is reduced by 10%, the extra resistance to be put in the armature circuit to maintain the same speed and torque will be 3.1 Ω 2 .1 Ω 1.79 Ω 1.8 9 Ω 3.1 Ω 2 .1 Ω 1.79 Ω 1.8 9 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to V2 V f f2 V2 V f f2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In one 132 / 33 kV transformer the LV resistance is 0.02 per unit. The resistance referred to HV side is 0.16 pu. 0.01 pu. 0.08 pu. 0.02 pu. 0.16 pu. 0.01 pu. 0.08 pu. 0.02 pu. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer oil is used as inert medium. an insulator. both A and B. a coolant. inert medium. an insulator. both A and B. a coolant. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS