In a parallel circuit, which formula is used to find the total current when voltage and total resistance are known?

In a parallel circuit, the total current can be calculated using the formula ( I_T = \frac{E_1}{R_{\text{total}}} ). In this context, the notation signifies that the total current ( I_T ) is equal to the voltage ( E_1 ) across the circuit divided by the total resistance ( R_{\text{total}} ) of the circuit.

This relationship arises from Ohm's Law, which states that current is equal to voltage divided by resistance. In parallel circuits, the voltage across each branch is the same, which allows for this calculation. Knowing the total resistance and voltage enables you to compute the overall current flowing from the power source in the circuit.

Understanding this formula is essential for analyzing parallel circuits, as it helps in designing and troubleshooting electrical systems effectively.