A charge $q_{0}$ is brought from infinity to the centre of dipole. Find work done?

2 J

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0 J

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3 J

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4 J

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Solution

The correct option is B $0 J$
Work done in moving charge from point A to B, $W_{A B} = q_{o} V_{A B}$
Let the point A is at infinity and B at the centre of dipole.
Potential at infinity i.e A is zero i.e $V_{A} = 0$
Net potential at the centre of the dipole is also zero i.e $V_{B} = 0$
$⟹$ $V_{A B} = 0$
$⟹ W_{A B} = 0$

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

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

A charge $q_{0}$ is brought from infinity to the centre of dipole. Find work done?