Electrical Machines Voltage across the open circuited field termninals of a synchorous machine under slip test is DC of slip frequency. DC. A modulated supply frequency AC voltage with slip frequency envelop. AC of supply frequency. DC of slip frequency. DC. A modulated supply frequency AC voltage with slip frequency envelop. AC of supply frequency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When R2 is rotor resistance, X2 the rotor reactance at supply frequency and s the slip, then the condition for maximum torque under running condition will be sR2 = X2. R2 = sX2. R2 = s2X2. R2 = s2X2. sR2 = X2. R2 = sX2. R2 = s2X2. R2 = s2X2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Centrifugal switch is absent in which of the single phase induction motor? PSC (permanent split capacitor) motor. Shaded pole motor. None of these Split phase motor. PSC (permanent split capacitor) motor. Shaded pole motor. None of these Split phase motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A cumulatively compounded dc motor delivers rated load power at rated speed. If the series field is short-circuited, then both decrese Ia increases and ωm decreses both armature current Ia and speed ωm increase Ia remains constant but ωm increase both decrese Ia increases and ωm decreses both armature current Ia and speed ωm increase Ia remains constant but ωm increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A crusher is equipped with Slip ring induction motor. Reluctance motor. DC shunt motor. Synchronous motor. Slip ring induction motor. Reluctance motor. DC shunt motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 1/√5 2/√5 1/√2 1/3 1/√5 2/√5 1/√2 1/3 ANSWER DOWNLOAD EXAMIANS APP
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