Dissipation of heat does not depend upon.

Explanation

Dissipation of Heat in Electrical Circuits: Heat dissipation in an electrical circuit is primarily governed by Joule's Law, which states that the heat produced by a current flowing through a conductor is proportional to the square of the current (I²), the resistance (R) of the conductor, and the time (t) for which the current flows. The formula is given by H = I²Rt. This means that the magnitude of the current is crucial in determining the amount of heat dissipated. Additionally, the nature of the current (whether it's alternating current (AC) or direct current (DC)) can influence the heat dissipation due to different resistive behaviors of circuits under AC or DC. However, the direction of the current does not impact the amount of heat dissipated, making Option A the correct answer. Other options are incorrect because they describe factors that do influence heat dissipation.