Question

(25.98)2 + 10.883 - 148 = 2.1 x ?³​

Answer 1

Answer:

Mains voltage is 240V and mains current is 0.7amp so inpur power will be 240×0.7=168watt

But output power is given as 140 Watt so efficinecy=(output/input)×100 % =83.33 %

Step-by-step explanation:

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