a transformer is used to light a120W 24v lamp from 240vac mains. the current in the main cable is 0.6A. the efficency of transformer is;;

Asked by ujjwalviky2003 | 1st Nov, 2017, 07:36: PM

Expert Answer:

begin mathsize 12px style
Power equals space voltage space straight x space current

straight n equals fraction numerator output space power over denominator input space power end fraction
equals fraction numerator 120 over denominator 0.6 straight x 240 end fraction
equals 0.83

efficiency equals space 83 percent sign end style

Answered by Gajendra | 6th Dec, 2017, 02:59: PM