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A step-down transformer reduces the supply voltage from 220 V to 11 V and increase the current from 6 A to 100 A.

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in Physics by (48.3k points)

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

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2 Answers

+1 vote
by (48.7k points)

Correct answer is (b) 0.83

0 votes
by (15 points)

image right answer

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