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Questions  >>  CBSE XII  >>  Physics  >>  Alternating current
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A transformer has 50 turns in the primary and 100 in the secondary . If the primary is connected to a $220\;v$ d.c supply . What will be the voltage across the secondary ?

$\begin{array}{1 1} 0.5\;v \\ 2\;v \\ 4\;v \\ zero \end{array} $

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