Electrostatics Question 205
Question: Three charges are placed at the vertices of an equilateral triangle of side a . The force experienced by the charge placed at the vertex A in a direction normal to BC is [AIIMS 2003]
Options:
A) $ Q^{2}/(4\pi {\varepsilon _{0}}a^{2}) $
B) $ -Q^{2}/(4\pi {\varepsilon _{0}}a^{2}) $
C) Zero
D) $ Q^{2}/(2\pi {\varepsilon _{0}}a^{2}) $
Show Answer
Answer:
Correct Answer: C
Solution:
$ |\overrightarrow{F _{B}}|=|\overrightarrow{F _{C}}|=k.\frac{Q^{2}}{a^{2}} $ Hence force experienced by the charge at A in the direction normal to BC is zero.
