The electric field is a conservative field. It means that * (a) Electric lines always make closed loops (b) Work done by external agency in moving a charge from one point to another in this field is always zero. (c) Work done by electric field in moving a charge from one point to another in this field depends on the path between these two points. (d) Work done by external force or electric force in moving a charge over any closed path in this field is always zero.
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Answer:
(d) Work done by external force or electric force in moving a charge over any closed path in this field is always zero is the required correct answer.
Explanation:
Definition of conservative field:
When work done by a field does not depend on the path chosen, it only depends on the initial and final position of the particle. Then, it is called as conservative field.
Since, electric field is conservative, when we move over an closed path, the total displacement becomes zero and hence works done by the field becomes zero.
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