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 sph

Question

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 :

TestHub · Accepted Answer

​ F PS ​ ∝ 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 ​ ∝ 2 Q ​ × 4 3 Q ​ F PS ​ ∝ 8 3 Q 2 ​ = 8 3 ​ × 16 = 6 N ​

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