Assertion (A): Two electric heaters of power \( P_1 \) and \( P_2 (> P_1) \) are joined in series across a dc source of voltage \( V \). The power consumed by the combination will be less than that consumed by \( P_1 \) when connected across the same source.
Reason (R): The power consumed by an electric device when connected to a dc source of voltage \( V \) is proportional to its resistance.