Electrostatics: JEE Main 2026 Physics question

JEE Main 2026 · 21 Jan, Evening shift · Q42

JEE Main 202621 Jan, Evening shiftPhysicsMediumElectrostatics167× since 2002

Consider two identical metallic spheres of radius

R

each having charge

Q

and mass

m

. Their centers have an initial separation of

4R

. Both the spheres are given an initial speed of

u

towards each other. The minimum value of

u

, so that they can just touch each other is : (Take

k=\frac{1}{4\pi\epsilon_0}

and assume

kQ^2>Gm^2

where

G

is the Gravitational constant)

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