NEET-XII-Physics
29: Electric Field and Potential
- #8Consider the situation in the figure. The work done in taking a point charge from P to A is WA, from P to B is WB and from P to C is WC.
(a) WA < WB < WC
(b) WA > WB > WC
(c) WA = WB = WC
(d) None of these
Figure
digAnsr: cAns : (c) WA = WB = WC
Points A, B and C lie at the same distance from the charge q, i.e. they are lying on an equipotential surface. So, work done in moving a charge from A to B (WAB) or B to C (WBC) is zero.
Hence, work done in bringing a charge from P to A = WA,
from P to B, WB = WA+WAB = WA
and from P to C, WC = WA + WAB + WBC = WA​
Hence, WA = WB = WC
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