Hi, Was hoping someone could help me. I have the following RL circuit: 20V input 8.2kohm resistor and 50mH Inductor in series. Determine time constant: I answered with: T = L/R 50mH / 8.2kohm = 6.09 uS Is this correct? The question I am stuck on is: Determine the value of VL after 1.5 time constants? I have the formula, VL = E ( e - t / T) I cant work out what to put for the t? I tried putting in: 20 (e - 1.5 / (6.09uS) but cant be right? If someone could help I would be much appreciated Thanks!