Transformers Power transformers are generally designed to have maximum efficiency around half-load near full-load no-load 10% overload half-load near full-load no-load 10% overload ANSWER DOWNLOAD EXAMIANS APP
Transformers To step 110 V ac down to 20 V ac, the turns ratio must be 0.018 18 5.5 0.18 0.018 18 5.5 0.18 ANSWER DOWNLOAD EXAMIANS APP
Transformers Sumpner's test is conducted on transformers to determine temperature all-day efficiency None of these stray losses temperature all-day efficiency None of these stray losses 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 None of these avoids core saturation and high voltage induction protects the primary circuit is safe to human beings None of these avoids core saturation and high voltage induction ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer core has air gaps, then, _________ Eddy current is increased Hysteresis loss is decreased Magnetising current is greatly increased Reluctance of magnetic path is decreased Eddy current is increased Hysteresis loss is decreased Magnetising current is greatly increased Reluctance of magnetic path is decreased ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load primary current is about ______of full load primary current. 3-5% 15-30% 30-40% Above 40% 3-5% 15-30% 30-40% Above 40% ANSWER DOWNLOAD EXAMIANS APP