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