Electrical Machines Cogging of induction motor occurs at low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are not equal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine both the windings have thick leads armature winding has thin leads whereas field winding has thick leads both the windings have thin leads armature winding has thick leads whereas field winding has thin leads both the windings have thick leads armature winding has thin leads whereas field winding has thick leads both the windings have thin leads armature winding has thick leads whereas field winding has thin leads ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by rotor of a dc machine. stator of a induction machine. rotor of an synchronous machine. stator of a dc machine. rotor of a dc machine. stator of a induction machine. rotor of an synchronous machine. stator of a dc machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor uses 4-point starter? DC shunt motor with field weaking control. DC shunt motor with armature resistance. DC compound motor. DC series motor. DC shunt motor with field weaking control. DC shunt motor with armature resistance. DC compound motor. DC series motor. 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 = 8Ω and Xq = 10.8Ω Xd = 9Ω and Xq = 9.6Ω Xd = 10.8Ω and Xq = 8Ω Xd = 9.6Ω and Xq = 9Ω Xd = 8Ω and Xq = 10.8Ω Xd = 9Ω and Xq = 9.6Ω Xd = 10.8Ω and Xq = 8Ω Xd = 9.6Ω and Xq = 9Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Decrease in speed demanding less armature current. Decrease in speed but armature current remains the same. Increase in speed demanding more armature current. Increase in speed but armature currnet remains the same. Decrease in speed demanding less armature current. Decrease in speed but armature current remains the same. Increase in speed demanding more armature current. Increase in speed but armature currnet remains the same. ANSWER DOWNLOAD EXAMIANS APP
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