First slide

Electric dipole

Question

A positively charged very large sheet has a charge density of $' σ' coul / m^{2} .$ An electric dipole of moment ‘P’ is placed near the sheet of charge at right angles to the sheet as shown in figure. Find the work done in rotating the dipole through an angle of $180^{0} .$

Moderate

Solution

$E = \frac{σ}{2 ε_{0}}, U_{i} = - \vec{P} . \vec{E} = - \frac{σρ}{2 ε_{0}}, U_{f} = - (- \vec{P}) . \vec{E} = + \frac{σP}{2 ε_{0}} ∴ W = U_{f} - U_{i} = \frac{σP}{ε_{0}}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App