\textbf{63.} Two electrical resistances A and B, when connected individually to a constant electrical potential difference, the consumed power of A is twice the consumed power of B. Now if we connect them in series and apply the same potential difference across both, the consumed power of A is how many times the consumed power of B?
$$
(1)\ \frac{1}{2} \qquad (2)\ \frac{1}{4} \qquad (3)\ 2 \qquad (4)\ 4
$$