Transformers The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is 2 mH 8 μH 4 μH 2 μH 2 mH 8 μH 4 μH 2 μH ANSWER DOWNLOAD EXAMIANS APP
Transformers How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V? 9 V 0.9 V 90 V 900 V 9 V 0.9 V 90 V 900 V ANSWER DOWNLOAD EXAMIANS APP
Transformers A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is 1 V 1.7 V 0 V 0.85 V 1 V 1.7 V 0 V 0.85 V ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the approximate efficiency of large transformers? 85% 65% 75% 95 % 85% 65% 75% 95 % ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer will have zero efficiency at Half full load No load None of the listed here Full load Half full load No load None of the listed here Full load 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 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 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS