A) \[\frac{Q}{4}\]
B) \[\frac{Q}{2}\]
C) \[Q\]
D) \[\frac{3Q}{2}\]
Correct Answer: B
Solution :
In balance condition Þ \[QE=mg\] Þ \[Q\frac{V}{d}=\left( \frac{4}{3}\pi {{r}^{3}}\rho \right)\,g\] Þ \[Q\propto \frac{{{r}^{3}}}{V}\] Þ \[\frac{{{Q}_{1}}}{{{Q}_{2}}}={{\left( \frac{{{r}_{1}}}{{{r}_{2}}} \right)}^{3}}\times \frac{{{V}_{2}}}{{{V}_{1}}}\] Þ \[\frac{Q}{{{Q}_{2}}}={{\left( \frac{r}{r/2} \right)}^{3}}\times \frac{600}{2400}=2\] Þ Q2 = Q / 2You need to login to perform this action.
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