Question

Find the potential difference between the points A and B and between the points B and C of figure (32-E33) in steady state.

Figure 32-E33

Answer 1

$C_{eq}=\left[\right(3\mu fP3\mu f\left)S\right(1\mu f\left)\right]1\left(P\mu f\right)$

$[S=Series,P=Parallel]$

$=\left[\right(3+3\left)\mu fS\right(2\mu f\left)\right]P1\mu f$

$=\frac{3}{2}+1=\frac{5}{2}\mu f$

$V=100V$

Q = CV = $\frac{5}{2}\times 100=250\mu c$

Charged stored across 1$\mu f$ capacitors = $100\mu c$

Charge flowing from A to B = 150 $\mu c$ Q

Ceq between a and b is 6 $\mu f$ = C

potential drop across AB = V

= $\frac{Q}{C}$ =25 V