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Question

A charge q0 is brought from infinity to the centre of dipole. Find work done?

A
2 J
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B
0 J
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C
3 J
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D
4 J
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Solution

The correct option is B 0 J
Work done in moving charge from point A to B, WAB=qoVAB
Let the point A is at infinity and B at the centre of dipole.
Potential at infinity i.e A is zero i.e VA=0
Net potential at the centre of the dipole is also zero i.e VB=0
VAB=0
WAB=0

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