The work done to move a charge along

Question:

The work done to move a charge along an equipotential from A to B

(a) cannot be defined as

$-\int_{A}^{B} E . d l$

(b) must be defined as

$-\int_{A}^{B} E . d l$

(c) is zero

 

(d) can have a non-zero value

Solution:

The correct answer is

(b) must be defined as

$-\int_{A}^{B} E . d l$

(c) is zero

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