Question

The value of the voltage V after taking the partial fractions in the equation V/(2s+15)+(V-[(100/s)+30])/(3s+10)=0 is?

(a) 12 + 60/s + 10/(s+5)

(b) 12 – 60/s + 10/(s+5)

(c) 12 – 60/s – 10/(s+5)

(d) 12 + 60/s – 10/(s+5)

I had been asked this question during an interview.

I would like to ask this question from The Impulse Function in Circuit Analysis topic in division Application of the Laplace Transform in Circuit Analysis of Network Theory

Answer 1

Right answer is (a) 12 + 60/s + 10/(s+5)

The best explanation: By taking the partial fractions we get V = 60/s-20/(s+5)+12+30/(s+5) and on solving the equation we get V = 12+60/s+10/(s+5).