Here, Torque τ=pEsinθ 
Potential energy of the dipole U=−∫τdθ=−∫π/20pEsinθdθ=pE[cosθ−0]=−pEcosθ
NEET UG 2012 — Physics Electromagnetism
An electric dipole of moment p is placed in an electric field of intensity E. The dipole acquires a position such that the axis of the dipole makes an angle θ with the direction of the field. Assuming that the potential energy of the dipole to be zero when θ=90∘, the torque and the potential energy of the dipole will respectively be
Held on 30 Apr 2012 · Verified 9 Jul 2026.
pEsinθ,−pEcosθ
pEsinθ,−2pEcosθ
pEsinθ,2pEcosθ
pEcosθ,−pEsinθ
Sign in to track your attempts and accuracy.
Sign in to keep a private note on this question. Nothing you write is ever public.
Two point charges +2μC and -2μC are placed 10 cm apart. The electric field at the midpoint is:
A parallel plate capacitor made of circular plates is being charged such that the surface charge density on its plates is increasing at a constant rate with time. The magnetic field arising due to displacement current is :
Two identical charged conducting spheres $A$ and $B$ have their centres separated by a certain distance. Charge on each sphere is q and the force of repulsion between them is $F$. A third identical uncharged conducting sphere is brought in contact with sphere A first and then with B and finally removed from both. New force of repulsion between spheres $A$ and $B$ (Radii of $A$ and $B$ are negligible compared to the distance of separation so that for calculating force between them they can be considered as point charges) is best given as :
The electric potential at distance r from a point charge q is V = q/(4πε₀r). The electric field E is:
The current passing through the battery in the given circuit, is : 
Work through every NEET UG Electromagnetism PYQ, year by year.