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As shown in fig.If a charge +Q is carried from a point A(r, 135degree) to point B(r, 45degree).If dipole moment is P then the work done by the external agent is

As shown in fig.If a charge +Q is carried from a point A(r, 135degree) to point B(r, 45degree).If dipole moment is P then the work done by the external agent is

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Grade:12th pass

1 Answers

Suresh Sonkar
42 Points
2 years ago
The potential at distance r from the dipole is:
Vr  =  Kpcosθ/r2
Where θ is the angle between r vector and p vector
So potential difference from A to B:
VAB = (Kp/r2)(cos45 – cos135)
So work done will be:
(change in potential energy) x(charge)
W = VAB *Q  = (Kp/r2)(cos45 – cos135) * Q

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