CUET · PHYSICS · PYQ PAPER 2023
The work done by the field of a nucleus in a complete circular orbit of the electron is
- A \(\frac{ k ( Z e) e}{ r }\)
- B \(\frac{ k ( Ze ) e }{ r ^2}\)
- C \(-\frac{k\left(Z_e\right) e}{r^2}\)
- D Zero
Answer & Solution
Correct Answer
(D) Zero
Step-by-step Solution
Detailed explanation
In a circular orbit, the electrostatic force acts radially toward the nucleus, while the displacement of the electron is always tangential. Since the force and displacement are perpendicular \(\left(90^{\circ}\right)\) at every point, the work done ( \(W=F d \cos \theta\) ) is…
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