Four capacitors are connected in a circuit as shown in the figure. The effective capacitance in $\mu F$ between points $A$ and $B$ will be
A$\frac{{28}}{9}$
B$4$
C$5$
D$18$
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C$5$
c (c) The circuit can be rearranged as
Net capacitance between $AB = \frac{{4 \times 12}}{{4 + 12}} + 2 = 5\,\mu F$
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An infinitely long thin wire, having a uniform charge density per unit length of $5 nC / m$, is passing through a spherical shell of radius $1 m$, as shown in the figure. A $10 nC$ charge is distributed uniformly over the spherical shell. If the configuration of the charges remains static, the magnitude of the potential difference between points $P$ and $R$, in Volt, is. . . .
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