Đáp án:
1.$2,{2.10^5}$ V
2.$0,5\left( {\rm{W}} \right)$
Giải thích các bước giải:
$\begin{array}{l}
1.\frac{{{U_2}}}{{{U_1}}} = \frac{{{n_2}}}{{{n_1}}} \Rightarrow \frac{{{U_2}}}{{2,{{2.10}^3}}} = \frac{{50000}}{{500}} \Rightarrow {U_2} = 2,{2.10^5}\left( V \right)\\
2.{p_{hp}} = {\left( {\frac{p}{{{U_2}}}} \right)^2}R = {\left( {\frac{{{{22.10}^3}}}{{2,{{2.10}^5}}}} \right)^2}.50 = 0,5\left( {\rm{W}} \right)
\end{array}$
