A coil which has an inductance of 40 mH and a resistance of2 2 is connected together to form a RL series circuit. If they are connected to a 20 V DC supply, the time constant of the RL series circuit is (a) 20 ms Q67. (b) 200 ms (c) 100 mns (d) 1000 ms
here is the solution, the time constant for RL ckt is T=L/R.
time constant is the time,it takes the voltage across the component to either fall (across the inductor) or rise (acros...