An electric dipole consists of two equal and opposite charges separated by

PHYSICS · Multi-part · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

An electric dipole consists of two equal and opposite charges ±5.0 nC\pm 5.0\,\text{nC} separated by 4.0 cm4.0\,\text{cm}. It is placed in a uniform electric field of magnitude 2.5×105 N C−12.5\times10^{5}\,\text{N}\,\text{C}^{-1}. The dipole axis initially makes an angle of 60∘60^{\circ} with the field. (a) Calculate the magnitude of the dipole moment. (b) Determine the potential energy of the dipole in this orientation. (c) How much work must an external agent do to rotate the dipole so that it becomes antiparallel to the field direction?

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