A step-down transformer is used on a 1000 V line to deliver 20 A at 120 V at the secondary coil. If the efficiency of the transformer is 80% the current drawn from the line is: [1]
A. 0.3 A
B. 3 A
C. 30A
D. 24 A
Answer:B
A step-down transformer is used on a 1000 V line to deliver 20 A at 120 V at the secondary coil. If the efficiency of the transformer is 80% the current drawn from the line is: [1]
A. 0.3 A B. 3 A C. 30A D. 24 A
Explanation: We know that,