Electrostatic Potential And Capacitance Ques 8
8. Three charges, each $+q$, are placed at the corners of an isosceles triangle $ABC$ of sides $BC, AC$ and $A B$. D and $E$ are the mid points of $B C$ and $CA$. The work done in taking a charge $Q$ from $D$ to $E$ is
[2011M]
(a) $\frac{3qQ}{8p \hat{I} _{0} a}$
(b) $\frac{qQ}{4p \hat{I} _{0} a}$
(c) Zero
(d) $\frac{3qQ}{4p \hat{I} _{0} a}$
Show Answer
Answer:
Correct Answer: 8.(c)
Solution:
- (c) $AC=BC$
$V_D=V_E$
We have,
$W=Q(V_D-V_E)$
$\Rightarrow W=0$
BETA
