A step-down transformer reduces the supply voltage from 220 V to 11 V and increase the current from 6 A to 100 A. Then its efficiency is
A. 1.2
B. 0.83
C. 0.12
D. 0.9
Answer:B
A step-down transformer reduces the supply voltage from 220 V to 11 V and increase the current from 6 A to 100 A. Then its efficiency is
A. 1.2 B. 0.83 C. 0.12 D. 0.9