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MHT CET Physics question

PhysicsAlternating CurrentMHT CET

A 220-volt input is supplied to 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 [CBSE PMT 2010]

Answer: (A)

Solution

Output power W, so input power W and A; 2.5 A is

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Question ID VK-082041