For two resistors with resistances $R_1$ and $R_2$ arranged in parallel, the total resistance $R_T$ is given by the formula below. $\frac{1}{R_T} = \frac{1}{R_1} + \frac{1}{R_2}$ Which statement is used in deriving this formula?
- AThe currents through the two resistors are equal.
- BThe potential difference across each resistor is the same.
- CThe supply current is split between the two resistors in the same ratio as the ratio of their resistances.
- DThe total power dissipated is the sum of the powers dissipated in the two resistors separately.