![]() ![]() Well, if we try to search it in Google, we will find the answer right away, provided by Wikipedia. As soon as the voltage is reduced, the capacitor is starting to do “discharging” with the direction opposite to the voltage source. The capacitor is starting to “charging up” as long as the DC voltage source is applied. This current is drawn by the capacitor and we call it a “charging current”. Then we apply a DC voltage to the circuit and the current is starting to flow. We may call this a “discharged” capacitor. The units of Time Constant is Tau, with the symbol of – □įirst, let’s assume that we have a circuit with an “empty” capacitor. We will find the time constant a lot if we try to solve an equation for capacitor charging. This time constant value is dependent on the reactive components, such as capacitor and inductor in the circuit. Moving on, this Time Constant represents the first-order time response of the circuit supplied by signal or voltage. ![]() Shortly, there will be some “time-delay” in the electrical circuit between input terminal and output terminal when the circuit is supplied by voltage or signal in direct current (DC) or alternating current (AC). We will find this time delay or time constant in every electrical and electronic circuit. Time Delay or Time Constant RC Circuitīefore moving on to the RC charging circuit and equation for capacitor charging, it is wise for us to understand this term, called Time Constant. Connecting the resistor, capacitor, and voltage source in series will be able to charge the capacitor (C) through the resistor (R). ![]()
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