Transformers Natural oil cooling is used for transformers upto a rating of 500 kVA 250 kVA 3000 kVA 1000 kVA 500 kVA 250 kVA 3000 kVA 1000 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because Uses inductive coupling Uses capacitive coupling A static device Uses electric coupling Uses inductive coupling Uses capacitive coupling A static device Uses electric coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large iron loss is increased considerably copper loss becomes high in proportion to the output secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large iron loss is increased considerably copper loss becomes high in proportion to the output ANSWER DOWNLOAD EXAMIANS APP
Transformers The transformer that should never the secondary open circuited when primary is energised is _______ Auto transformer Voltage transformer Current transformer Power transformer Auto transformer Voltage transformer Current transformer Power transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ? 25 Ω 62500 Ω 6250 Ω 250 Ω 25 Ω 62500 Ω 6250 Ω 250 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers The secondary of a current transformer is always short-circuited under operating conditions because it None of these protects the primary circuit avoids core saturation and high voltage induction is safe to human beings None of these protects the primary circuit avoids core saturation and high voltage induction is safe to human beings ANSWER DOWNLOAD EXAMIANS APP
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