Question

what is the practical application of initial and final value theorem that we use in laplace transform???

Answer 1

@Pallavi06 Have you studied first order capacitor circuits, or a simple resistor capacitor circuit??

Answer 2

yaah.....have studies simple R-c circuit....

Answer 3

When we write a nodal equation or KVL, we get a differential equation.
We solve the differential equation and we get a solution (equation)for voltage or current which in terms of 't'.
Now we could find the initial or final value from the equation.
But the process is painstakingly long, if our aim is to just find the initial and final value.
It's easy to take the laplace transform of the Differential Equation, and then use the initial and final value theorem to find the initial and final values.

Answer 4

do you get my point?

Answer 5

but then cant we just substitute 0 in the equation to get initial value in the equation?

Answer 6

nope, you can't put t=0 in differential equation

Answer 7

oh.......right....i was thinking about the solution that we get after solving it...........

Answer 8

thanks.....i got it now.......

Answer 9

Welcome :)