Electrostatics Question 762

Question: In moving from A to B along an electric field line, the work done by the electric field on an electron is 6.4×1019J. If ϕ1 and ϕ2 are equipotential surfaces, then the potential difference VCVA is

Options:

A) -4V

B) 4V

C) zero

D) 6.4V

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Wel.=q(ViVf)

or 6.4×1019=1.6×1019(VAVB)

or VAVB=4V or VAVC=4V (VB=VC)

or VCVA=4V



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