STANDARDPhysics-Electrostatics
STANDARD Physics Coulomb's Law MCQ Question
Type: MCQ-conceptual-Medium
An electron of charge e is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The Coulomb's force F between the two is:
A
-2ke²/r³
B
ke²/r²
C
-ke²/r²
D
-ke²/r³
Correct Answer
Option C
Detailed Explanation
Using Coulomb's law, the force between two charges is given by F = kq₁q₂/r². For an electron orbiting a nucleus, q₁ = -e and q₂ = +e, leading to F = -ke²/r².
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