Electrical Machines Torque angle of a synchorous machine operating from a constant voltage bus is usually defined as the space angle between Stator mmf wave and resultant mmf wave. Rotor mmf wave and stator mmf wave. Rotor mmf wave and resultant flux density wave. Stator mmf wave and resultant flux density. Stator mmf wave and resultant mmf wave. Rotor mmf wave and stator mmf wave. Rotor mmf wave and resultant flux density wave. Stator mmf wave and resultant flux density. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? Both (A) and (B). By varying supply voltage. By varying number of poles. By varying the supply frequency. Both (A) and (B). By varying supply voltage. By varying number of poles. By varying the supply frequency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous generator, if mechanical input is increased with constant excitation, the load angle will None of these increase either increase or decrease decrease None of these increase either increase or decrease decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load saturation characteristics are plotted between short circuit current and field current no load voltage and armature current short circuit current and armature current no load voltage and field current short circuit current and field current no load voltage and armature current short circuit current and armature current no load voltage and field current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines shape of net flux density is? flat tapped or trapezoidal peaky in nature sine wave saddle shape flat tapped or trapezoidal peaky in nature sine wave saddle shape ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power will be developed when back emf is half of the supply voltage. equal to supply voltage. double the supply voltage. All of these half of the supply voltage. equal to supply voltage. double the supply voltage. All of these ANSWER DOWNLOAD EXAMIANS APP
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