A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated in
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(d) ${R_{steel}} = 2{R_{Al}}$. In series $H \propto R$ ($i$ is Same)
So, $H$ will be more in steel wire . In parallel $H \propto \frac{1}{R}$ ($V$ is Same), so $H$ will be more in aluminium wire.
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