Physics - EMI/AC Question with Solution | TestHub

It is given that the amount of heat produced by$\mathrm{AC}$current is twice of the amount of heat produced by$\mathrm{DC}$current.

$I=1.414 \mathrm{A}$

$\therefore I_{\mathrm{r}\mathrm{m}\mathrm{s}}^2\cdot R=2\times I^{2}R$

$I_{\mathrm{r}\mathrm{m}\mathrm{s}}^2=2\times {\left(1.414\right)}^2=2\times 2$

$\Rightarrow I_{rms}=2 \mathrm{A}$