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NEET 2014 Physics question

PhysicsAlternating CurrentNEET 2014

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are

Answer: (2)

Solution

Input power at V, so primary current A. Output power of kW. With A: V. So the

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Question ID VK-091507