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A pure resistive circuit element 'x' whe...

A pure resistive circuit element `'x'` when connected to an `A.C` supply of peak voltage `100 V` gives a peak current of `4 A` which is in phase with the voltage. A second circuit element `'y'` when connected to the same `AC` supply also gives the same value of peak current but the current lags behind by `90^(@)`. If the series combination to of `'x'` and `'y'` is connected to the same supply. `R.M.S` value of current is

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