A) \[+Q\text{/2}\]
B) \[-\text{Q/2}\]
C) \[-\text{Q/4}\]
D) \[+Q\text{/4}\]
Correct Answer: C
Solution :
For equilibrium, \[{{\text{\vec{F}}}_{a}}+{{\text{\vec{F}}}_{b}}\,=\,0\] |
\[{{\vec{F}}_{a}}\,=\,-{{\vec{F}}_{b}}\] |
\[\frac{\text{KQQ}}{{{d}^{2}}}\,=\,\frac{\text{KQq}}{{{\text{(d/2)}}^{\text{2}}}}\] |
\[\Rightarrow \] \[\text{q}\,=\,-\frac{\text{Q}}{4}.\] |
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