A 0.1 μF capacitor charged to 100 V is discharged through a 1 kΩ resistor. The time in ms (round off to two decimal places) required for the voltage across the capacitor to drop to 1 V is ___________.
The time constant is RC=1000(0.1 μF)=0.1 ms. Discharge follows \(V_C(t)=100e^{-t/(0.1\,\mathrm{ms})}\). Setting VC=1 gives \(t=0.1\ln100=0.460517\ \mathrm{ms}\), or 0.46 ms.
Important Questions from Transient Analysis
During discharging of a capacitor of C = 100 µF through a resistance of 1 KΩ applied with 50 V, the voltage at the time of the it's time constant is
There are no transients in pure resistance circuit because they
Zero initial conditions mean that the system is
In a series RL circuit the value of inductance is 1 Henry and resistance is 10 ohms. If 100 V DC is applied to the circuit at t = 0, what is the value of current at 0.1 sec?
A resistor and a capacitor are connected in series to a 10 V dc supply through a switch. The switch is closed at t = 0, and the capacitor voltage is found to cross 0 V at t = 0.4τ, where τ is the circuit time constant. The absolute value of percentage change required in the initial capacitor voltage if the zero crossing has to happen at t = 0.2τ is _______ (rounded off to 2 decimal places).
