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  • A Step Down Transformer connected to an AC mains supply of 220V is made to operate at 11 V ,44W lamp. ingoring Power losses  in the Transformer. what is current in the primary Circuit ? <

A Step Down Transformer connected to an AC mains supply of 220V is made to operate at 11 V ,44W lamp. ingoring Power losses  in the Transformer. what is current in the primary Circuit ? 

Option: 1

0.2A


Option: 2

0.4A


Option: 3

2A


Option: 4

4A


Answers (1)

best_answer

Since power loss is ingnored

n=1=\frac{\left ( power \right )output}{\left ( power \right )input}

P_{input}=P_{output}

V_{p}I_{p}=V_{s}I_{s}

I_{p}=\frac{44}{220}=\frac{1}{5}=0.2A

Posted by

sudhir.kumar

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