Question

a 220 volts input is supplied to a transformer the output circuit draws a current of 2.0 amp at 440 volts if the efficiency of transformer is 80 the current drawn by the primary winding of the transformer is ?

Answer 1

5.0 A

Efficiency is defined as the ratio of output power and input power
n% = P out / P in * 100 = Vs is/ Vp ip *100
80 = (2*440/ 220* ip) * 100
ip = 5A

Answer 2

Answer:

n% = Pout/Pin × 100

= VsIs/VpIp × 100

80 = 2 × 440/220 × Ip × 100

IP = 5A Ans......

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