What is the correct formula to calculate the equivalent of three inductors in a parallel circuit?

The formula for calculating the equivalent inductance of inductors connected in parallel is given by the equation ( LT = 1 / (1/L1 + 1/L2 + 1/L3) ). This approach stems from the principle of how inductors behave in a parallel configuration, where the reciprocal of the total inductance is the sum of the reciprocals of each inductor's inductance.

When inductors are connected in parallel, the overall inductance is influenced by the individual inductances working together to oppose changes in current. Each inductor provides a path for magnetic flux, and the total inductance is reduced compared to the individual inductances due to the nature of parallel paths. The derived formula reflects this interaction, allowing for a straightforward way to compute the total inductance when multiple inductors are involved.

In contrast, the other formulas listed do not accurately represent the characteristics of inductors in a parallel setup. The formula that sums the inductances without reciprocal transformations would suggest that inductors increase total inductance, which is not the case in parallel arrangements. Additionally, multiplication of inductances or subtraction does not align with the physical principles governing parallel circuits; these operations apply in different contexts or configurations. Thus, the correct answer provides a precise