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PhysicsElectrostaticsElectric Field & ForceHard2 minPYQ_2024

PhysicsHardsingle choice

Two identical conducting spheres $P$ and $S$ with charge $Q$ on each, repel each other with a force $16 N$ . A third identical uncharged conducting sphere $R$ is successively brought in contact with the two spheres. The new force of repulsion between $P$ and $S$ is :

Options:

Answer:

Solution:

$F_{PS} \propto Q^{2} F_{PS} = 16 N$
Now If $P & R$ are brought in contact then
Now If $S & R$ are brought in contact then
New force between $P & S$ is : $F_{PS} \propto \frac{Q}{2} \times \frac{3 Q}{4} F_{PS} \propto \frac{3 Q ^{2}}{8} = \frac{3}{8} \times 16 = 6 N$

Stream:JEESubject:PhysicsTopic:ElectrostaticsSubtopic:Electric Field & Force

⏱ 2mℹ️ Source: PYQ_2024

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