A step down transformer connected to an ...

A step down transformer connected to an ac mains supply of 220V is made to operate at 11V, 44W lamp. Ignoring power losses in the transformer what is the current in primary circuit.

0.4 A

0.2A

Text Solution

Verified by Experts

The correct Answer is:

`V_(S)/V_(P)=I_(P)/I_(S)`
`V_(S)I_(S)=V_(P)I_(P)rArr44=(220)I_(P)`
`I_(P)=44/220=2/10=0.2A`

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