Electrical Machines For pure resistive load what is the armature reaction? demagnetization magnetization All of these cross magnetization demagnetization magnetization All of these cross magnetization ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two transformers with identical rating, are designed with flux densities of 1.2 and 1.4 Wb / m2 respectively. The weight of first transformer per kVA is equal to that of second transformer. less than that of second transformer. more than that of second transformer. none of these. equal to that of second transformer. less than that of second transformer. more than that of second transformer. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines CRGO steel is used in the core of transformer to reduce eddy current loss. ohmic loss. both eddy current and hysteresis loss. hysteresis loss. eddy current loss. ohmic loss. both eddy current and hysteresis loss. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is ineffective. demagnetizing. cross – magnetizing. magnetizing. ineffective. demagnetizing. cross – magnetizing. magnetizing. 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 2/√5 1/√2 1/√5 1/3 2/√5 1/√2 1/√5 1/3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If field current is decreased in shunt dc motor, the speed of the motor decreases. increases. remains same. None of these decreases. increases. remains same. None of these ANSWER DOWNLOAD EXAMIANS APP
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