# Switched RL Series Circuit: Time Constant#

Consider the $$RL$$ circuit shown below.

The current in the circuit reaches half of its maximum value in $${{ params.t }}\rm\ ms$$ after switch $$\rm S$$ is thrown.

## Part 1#

Determine the time constant $$\tau_L$$ of the circuit.

Please enter in a numeric value in $$\rm\ s$$.

## Part 2#

Given $$L = {{ params.L }}\rm\ mH$$, determine the resistance $$R$$ of the circuit.

Please enter in a numeric value in $$\rm\ \Omega$$.

### pl-submission-panel#

$$\tau_L =$$ $$\rm\ s$$
$$R =$$ $$\rm\ \Omega$$