Transformers A transformer is an efficient device because A static device Uses inductive coupling Uses capacitive coupling Uses electric coupling A static device Uses inductive coupling Uses capacitive coupling Uses electric coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Current transformer Power transformer Auto transformer Potential transformer Current transformer Power transformer Auto transformer Potential transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum efficiency of a distribution transformer is at full load at 80% full load at no load at 50% full load at full load at 80% full load at no load at 50% full load ANSWER DOWNLOAD EXAMIANS APP
Transformers We can find _______of the transformer with open circuit test. Total equivalent resistance Total equivalent leakage reactance Copper losses Turn ratio Total equivalent resistance Total equivalent leakage reactance Copper losses Turn ratio ANSWER DOWNLOAD EXAMIANS APP
Transformers The approximate efficiency of a large transformer is 50% 80% 65% 95% 50% 80% 65% 95% ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum flux produced in the core of a transformer is ______ Directly proportional to supply frequency Inversely proportional to primary voltage None of the listed here Inversely proportional to supply frequency Directly proportional to supply frequency Inversely proportional to primary voltage None of the listed here Inversely proportional to supply frequency ANSWER DOWNLOAD EXAMIANS APP