Two identical conducing spheres having unequal positive charges q₁ and q₂ separated by distance

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1. Electric Charges and Fields

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Two identical conducing spheres having unequal positive charges $q_1$ and $q_2$ separated by distance $r$. If they are made to touch each other and then separated again to the same distance. The electrostatic force between the spheres in this case will be (neglect induction of charges)

A

Less than before

B

Same as before

C

More then before

D

Zero

Solution

$\mathrm{F}_{1} \propto \mathrm{q}_{1} \mathrm{q}_{2}$

$\mathrm{F}_{2} \propto\left(\frac{\mathrm{q}_{1}+\mathrm{q}_{2}}{2}\right)^{2}$

So $\mathrm{F}_{2}>\mathrm{F}_{1}$

Standard 12

Physics

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