MATLAB: Plot overdamped response of the voltage across the capacitor.

overdamped responserlc

Over-damped response: Vi = 0 V, Vf = 10 V, R = 250 Ω, L = 10 mH, and C = 1 μF.
this is the equation for the voltage across the capacitor, but when i plot it on matlab i get straight lines and not a curve.
vC (t) = − 13.33Vexp(−t/0.2 ms) + 3.33Vexp(−t/50 μs) + 10V
thanks in advance.

Best Answer

Hi Sasheel,
The voltage across the capacitor is getting saturated at approximately 1ms itself but your code is plotting the data until 1.5 seconds. So, try rescaling 't' to milliseconds instead of seconds to observe the exponential response. Try running the below code:
t= 0:0.000005:0.002; 
y = -13.33*exp(-t/0.0002)+3.33*exp(-t/0.00005)+10;
plot(t,y);
Hope it helps!
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