When the switch S in the circuit shown is closed, the time constant for the growth of current in R₂ is: A) L/R₁ B) L/R₂ C) L/(R₁ + R²) D) L(R₁ + R₂)/(R₁R₂) E) (L/R₁ + L/R₂)/2

Question

Quizplus · Accepted Answer

When the switch is closed, the circuit can be simplified to a series circuit containing R₂ and the coil L. The time constant for the growth of current in a series RC circuit is defined as the product of the resistance and capacitance (RC). In this case, the resistance is simply R₂, and there is no capacitance present. Therefore, the time constant is simply L/R₂.

When the Switch S in the Circuit Shown Is Closed