W=ΔU=Q(VD−VC) where Vc=0 =Q[4πε0(3L)q−4πε0(L)q.0] 3πε0LqQ
NEET UG 2007 — Physics Electromagnetism
2007mcqhard
Charges +q and −q are placed at points A and B respectively which are a distance 2L apart, C is the midpoint between A and B. The work done in moving a charge +Q along the semicircle CRD is 
Official previous-year question
Held on 30 Apr 2007 · Verified 9 Jul 2026.
Options
- A
2πε0LqQ
- B
6πε0LqQ
- C
3πε0LqQ
- D
4πε0LqQ
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