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2. Electric Potential and Capacitance
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Six charges $+ q ,- q ,+ q ,- q ,+ q$ and $- q$ are fixed at the corners of a hexagon of side $d$ as shown in the figure. The work done in bringing a charge $q _0$ to the centre of the hexagon from infinity is :$\left(\varepsilon_0-\right.$ permittivity of free space)
A
$0$
B
$\frac{- q ^2}{4 \pi \varepsilon_0 d }$
C
$\frac{- q ^2}{4 \pi \varepsilon_0 d }\left(3-\frac{1}{\sqrt{2}}\right)$
D
$\frac{-q^2}{4 \pi \varepsilon_0 d }\left(6-\frac{1}{\sqrt{2}}\right)$
(NEET-2022)
Solution
Work$=U_{ f }-U_{ i }$
$\qquad=0-0$
Work$=0$
Standard 12
Physics
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