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JEE Main202125 Feb 2021Evening ShiftPhysicsElectrostaticsActual

Two identical conducting spheres with negligible volume have 2 . 1   nC and - 0 . 1   nC charges, respectively. They are brought into contact and then separated by a distance of 0 . 5   m . The electrostatic force acting between the spheres is ___ × 10 - 9   N . [Given : 4 π ε 0 = 1 9 × 10 9 SI unit]

Correct answer

0

Step-by-step solution

q = 2 . 1 - 0 . 1 2   nC = 1   nC f = 9 × 10 9 × 10 - 18 0 . 5 2 = 36 × 10 - 9

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