COMEDK · Physics · 17. Electrostatics
Three charges \(-q,+Q\) and \(-q\) are placed at equal distances along a straight line. If the total \(P E\) of the system is zero, then the ratio \(Q / q\) becomes
- A \(\frac{1}{8}\)
- B \(\frac{1}{6}\)
- C \(\frac{1}{4}\)
- D \(\frac{1}{2}\)
Answer & Solution
Correct Answer
(C) \(\frac{1}{4}\)
Step-by-step Solution
Detailed explanation
The given situation is shown below Total potential energy of the system \(=0\) \[ \Rightarrow \frac{1}{4 \pi \varepsilon_{0}}\left[\frac{(-q) Q}{a}+\frac{(+Q)(-q)}{a}+\frac{(-q)(-q)}{2 a}\right]=0 \]…
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