| p{3cm}p{3cm}p{3cm}} (1) $22.5$ | (2) $25$ | (3) $37.5$ | (4) $45$ |
\textbf{182 –} The resistance of a copper wire at $20\,^\circ\text{C}$ is $40\,\Omega$. An electric current passes through the wire and due to the temperature increase, its electrical resistance reaches $46.8\,\Omega$. What is the temperature of the wire in this case, in degrees Celsius?
$$\left(\alpha_{\text{Cu}} = 0.0068\,\frac{1}{\text{K}}\right)$$
\begin{tabular}{p{3cm}p{3cm}p{3cm}p{3cm}}
(1) $22.5$ & (2) $25$ & (3) $37.5$ & (4) $45$
\end{tabular}
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