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  4. The effective capacitance between the points A and B in the circuit shown in (μ F) is (capacitance of each capacitor is(μ F)

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Q. The effective capacitance between the points $A$ and $B$ in the circuit shown in $(\mu F)$ is (capacitance of each capacitor is$(\mu F)$Physics Question Image

KCETKCET 1997Electrostatic Potential and Capacitance

Solution:

Capacitance of 2 capacitors in parallel = 1 + 1 = 2$\mu$F
Capacitance of 1 $\mu$F, 2$\mu$F and 1 $\mu$F in series is given by, $\frac{1}{C} = \frac{1}{1} + \frac{1}{2} + \frac{1}{1} = \frac{2 + 1 + 2}{2} = \frac{5}{2}$
$i.e.$ C = $\frac{2}{5} = 0.4 \, \mu \, F$