Three identical spheres each having a charge 2q and radius R are kept such that each touches the other two. Find the magnitude of the electric force on any sphere due to the other two

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3q24πε0R2

3q22πε0R2

3q28πε0R2

3q24πε0R2

answer is D.

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Detailed Solution

F=14πε0(2q)2(2R)2=q24πε0R2Fnet =F2+F2+2F2cos⁡600⇒Fnet =3F=3q24πε0R2⇒Fnet =3q24πε0R2

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