A 220 volts input is supplied to a transformer. The output

A 220 volts input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is

	V₂	= 0.8	I₁
	V₁		I₂

⇒	V₂I₂	= 0.8
	V₁I₁

V₁ = 220 V, I₂ = 2.0 A, V₂ = 440 V

I₁ =	V₂I₂	×	10	=	440 × 2 × 10	= 5 A
	V₁		8		220 × 8