Transformers The turns ratio required to match an 80 source to a 320 load is 80 4 20 2 80 4 20 2 ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because voltage drop both in primary and secondary becomes large copper loss becomes high in proportion to the output iron loss is increased considerably secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large copper loss becomes high in proportion to the output iron loss is increased considerably secondary output is much less as compared to primary input ANSWER DOWNLOAD EXAMIANS APP
Transformers The open circuit test on a transformer gives _______ Friction losses Total losses Iron losses Copper losses Friction losses Total losses Iron losses Copper losses ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because it _______ Uses capacitive coupling Uses electric coupling Is a static device Uses inductive coupling Uses capacitive coupling Uses electric coupling Is a static device Uses inductive coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary and secondary of a transformer are ______ coupled. Magnetically Electrically Electrically and magnetically None of the listed here Magnetically Electrically Electrically and magnetically None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The secondary of a current transformer is always short-circuited under operating conditions because it protects the primary circuit is safe to human beings avoids core saturation and high voltage induction None of these protects the primary circuit is safe to human beings avoids core saturation and high voltage induction None of these ANSWER DOWNLOAD EXAMIANS APP
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