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Questions  >>  CBSE XII  >>  Math  >>  Model Papers
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a)A capacitor is used in the primary circuit of induction coil why? b)A power transmission line feeds input power at 2300V to a step down transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary in order to get the output power at 230V? c)What is the peak value at 22VAC?

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