Explanation: \begin{equation} R_1 = \rho \frac{L_1}{A_1} \end{equation} \begin{equation} R_2 = \rho \frac{L_2}{A_2} \end{equation} \begin{equation} \frac{R_1}{R_2} = \frac{L_1}{L_2} \frac{A_2}{A_1} \end{equation} \begin{equation} \frac{R_1}{R_2} = \frac{L_1}{L_2} \frac{r_2^2}{r_1^2} \end{equation} \begin{equation} \frac{R_1}{R_2} = \frac{2L_2}{L_2} \frac{r_2^2}{r_1^2} \end{equation} \begin{equation} \frac{R_1}{R_2} = \frac{2(2r_2)^2}{(2r_1)^2} \end{equation} \begin{equation} \frac{R_1}{R_2} = \frac{1}{2} \end{equation} \begin{equation} R_2 = 2R_1 \end{equation} \begin{equation} i_1 = 2i_2 \end{equation} \begin{equation} H_1 = \frac{i_1^2 R_1 t}{i_2^2 R_2 t} \end{equation} \begin{equation} H_1 = \frac{(2i_2)^2 R_1}{i_2^2 2R_1} \end{equation} \(\begin{equation} H_1 = 2 \end{equation} \begin{equation} H_1 = 2H_2 \end{equation}