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

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Q. In the given circuit potential of point A is $3000\, V$ and of $C$ is $1000 \,V$. Then potential of point B isPhysics Question Image

Solution:

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