Question

In the given circuit potential of point A is $3000V$ and of $C$ is $1000V$. Then potential of point B is

• A. 2000 V
• B. 1600 V
• C. 1500 V
• D. 1400 V

Answer 1

Answer: (D)

Effective capacitance of circuit - $4\mu F$ Charge stored in system $q=4\times 2000=8000\mu C$
$V_A-\frac{q}{C}=V_B$
$3000-\frac{8000}{5}=V_B$
$V_B=1400V$