Transformers A transformer is an efficient device because Uses inductive coupling A static device Uses capacitive coupling Uses electric coupling Uses inductive coupling A static device Uses capacitive coupling Uses electric coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is great than one less than one None of these approximately equal to one great than one less than one None of these approximately equal to one ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of cooling a power transformer is Any of these oil cooling natural air cooling air blast cooling Any of these oil cooling natural air cooling air blast cooling ANSWER DOWNLOAD EXAMIANS APP
Transformers Which motor is preferred for use in mines where explosive gases exist? Shunt motor Air motor Induction motor Synchronous motor Shunt motor Air motor Induction motor Synchronous motor ANSWER DOWNLOAD EXAMIANS APP
Transformers The power efficiency of a lightning transformer is always ______its all day efficiency. Less than Higher than None of the listed here Equal to Less than Higher than None of the listed here Equal to ANSWER DOWNLOAD EXAMIANS APP
Transformers When the secondary of a transformer is short circuited, the primary inductance _______ Remians unchanged Is increased Is decreased None of the listed here Remians unchanged Is increased Is decreased None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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