Electrical Machines The principal of starting of 3 - Φ IM is similar to repulsion motor type starting. transformer with short-circuited secondary. synchronous motor. capacitor run IM. repulsion motor type starting. transformer with short-circuited secondary. synchronous motor. capacitor run IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines 3rd harmonics are eliminated in induction motor by using delta connection. V connection. zig - zag connection. star connection. delta connection. V connection. zig - zag connection. star connection. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the air gap of IM is increased, ____________ will increase. magnetizing current. power factor. air gap flux. speed. magnetizing current. power factor. air gap flux. speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An IM cannot run at synchronous speed because induction motor will become synchronous motor. air friction will prevent it. rotor torque will not be produced. none of above. induction motor will become synchronous motor. air friction will prevent it. rotor torque will not be produced. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? By varying supply voltage. By varying the supply frequency. Both (A) and (B). By varying number of poles. By varying supply voltage. By varying the supply frequency. Both (A) and (B). By varying number of poles. ANSWER DOWNLOAD EXAMIANS APP
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