Identify the correct expression for the potential energy of an electric dipole of…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Identify the correct expression for the potential energy

U

of an electric dipole of moment

p

placed in a uniform electric field

E

making an angle

\theta

with the field. (a)

U=+pE\cos\theta

(b)

U=-\dfrac{pE\cos\theta}{2}

(c)

U=-pE\cos\theta

(d)

U=-pE\sin\theta