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2. Electric Potential and Capacitance
hard
Six point charges are kept at the vertices of a regular hexagon of side $L$ and centre $O$, as shown in the figure. Given that $K=\frac{1}{4 \pi \varepsilon_0} \frac{q}{L^2}$, which of the following statement $(s)$ is (are) correct?
$(A)$ the elecric field at $O$ is $6 K$ along $O D$
$(B)$ The potential at $O$ is zero
$(C)$ The potential at all points on the line $PR$ is same
$(D)$ The potential at all points on the line $ST$ is same.
A
$(A,B,C)$
B
$(A,B,D)$
C
$(A,C,D)$
D
$(B,C,D)$
(IIT-2012)
Solution
$E _0=6 K \text { (along } OD \text { ) } $
$V _0=0$
Potential on line $PR$ is zero Ans. $(A), (B), (C)$
Standard 12
Physics
