Electrical Machines Air core transformer as compared to iron core transformer, has no magnetic core loss. less magnetic core loss. more magnetic core loss. more copper loss. no magnetic core loss. less magnetic core loss. more magnetic core loss. more copper loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages? Delta side leads by 30°. Star side lags by -30°. Star side leads by 30°. Delta side lags by -30°. Delta side leads by 30°. Star side lags by -30°. Star side leads by 30°. Delta side lags by -30°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 2 pole lap winding dc machine , the resistance of one conductor is 2Ω and total number of conductors is 100. Find the total resistance 50Ω 100Ω 10Ω 200Ω 50Ω 100Ω 10Ω 200Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a step down transformer which one of the following statements is true? Secondary power is less than primary power. Number of secondary turns is less than primary turns. Number of secondary turns is more than that of primary. Secondary current is less than primary current. Secondary power is less than primary power. Number of secondary turns is less than primary turns. Number of secondary turns is more than that of primary. Secondary current is less than primary current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 2 KVA transformer has iron loss of 150 W and full load copper loss of 250 W. The maximum efficiency of the transformer would occur when the total loss is 400W 250 W 300 W 500 W 400W 250 W 300 W 500 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lap winding is prefered for which type of machines? low current and low voltage low current and high voltage high current and low voltage high current and high voltage low current and low voltage low current and high voltage high current and low voltage high current and high voltage ANSWER DOWNLOAD EXAMIANS APP
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