A dipole of dipole moment are in the same direction. Find the work done in rotating the dipole by an angle π.W=2EpW=-2EpW=EpW=-Ep
Question
A dipole of dipole moment are in the same direction. Find the work done in rotating the dipole by an angle π.
Solution
To find the work done in rotating the dipole by an angle π, we can use the formula:
W = -pEcosθ
where W is the work done, p is the dipole moment, E is the electric field, and θ is the angle between the dipole moment and the electric field.
In this case, the dipole moments are in the same direction, so the angle between them is 0. Therefore, θ = 0.
Substituting the values into the formula, we have:
W = -pEcos(0)
Since cos(0) = 1, the equation simplifies to:
W = -pE
So, the work done in rotating the dipole by an angle π is -pE.
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