Can someone clearly explain what it is meant by the time constant of an RC circuit. Because from what I have been told it is the time taken to charge the capacitor. However, when I search on google it mentions that it is the time taken to charge approx. 63% of the initial voltage. What if the initial voltage is 0V?
Would this definition apply to RL and RLc circuits as well?
I have probably missed something trivial.
Any help would be much appreciated. Thanks!