Two heating elements of resistance \( R_{1} \) and \( R_{2} \) when...

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Two heating elements of resistance \( R_{1} \) and \( R_{2} \) when operated at a constant supply of voltage, \( V \), consume powers \( P_{1} \) and \( P_{2} \) respectively. Deduce the expressions for the power of their combination when they
\( \mathrm{P} \) are, in turn, connected in (i) series and (ii) parallel across the same voltage supply.

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