![]() Putting this expression of i(t) in equation (i) we get, Now, if transfer of charge during this period (t) is q coulomb, then i(t) can be written as Hence, by applying Kirchhoff’s Voltage Law, in that circuit we get, Let us current at any instant is i(t).Īlso consider the voltage developed at the capacitor at that instant is V c(t). Now, if the switch S is suddenly closed, the current starts flowing through the circuit. ![]() ![]() To understand transient behavior of capacitor let us draw a RC circuit as shown below, The phenomenon of charging current or other electrical quantities like voltage, in capacitor is known as transient. The duration in which current changes in capacitor is known as transient period. The flows of electrons from source to capacitor and capacitor to source are nothing but electric current.Īt the beginning, this current will be maximum and after certain time the current will become zero. When these two voltages become equal to each other there will be no more flow of charge from source to capacitor. The voltage developed across the capacitor approaches to supply voltage the rate of charge accumulation in the capacitor decreases accordingly. As the charge accumulating in the capacitor increases, the voltage developed across the capacitor increases. In other words, accumulation of change in the capacitor starts instantly. ![]() When a voltage is suddenly applied across a capacitor, which are previously uncharged, electrons shifting from source to capacitor to source start immediately. ![]()
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