24P1Q16

16 C

$\displaystyle \begin{aligned}(\mathrm{I}\propto \frac{1}{{{r}^{2}}}) \\ \frac{{{\mathrm{I}}_{M}}}{{{\mathrm{I}}_{E}}}&=\frac{{{r}_{E}}^{2}}{{{r}_{M}}^{2}}&={{(\frac{1.5}{2.3})}^{2}}&=0.4253 \\ \end{aligned}$

$\displaystyle \begin{aligned}(P&=\mathrm{I}A) \\ {{\mathrm{I}}_{E}}{{A}_{E}}&={{\mathrm{I}}_{M}}{{A}_{M}} \\ {{A}_{M}}&=\frac{{{\mathrm{I}}_{E}}}{{{\mathrm{I}}_{M}}}{{A}_{E}} \\ &=\frac{1}{0.4253}(1.0) \\ &=2.35\text{ }{{\text{m}}^{2}} \end{aligned}$

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