An electric dipole of moment is rotated in a uniform electric field of magnitude from to

PHYSICS · Single correct · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

An electric dipole of moment 3.0×10−29 C m3.0\times10^{-29}\,\text{C\,m} is rotated in a uniform electric field of magnitude 5.0×104 N C−15.0\times10^{4}\,\text{N\,C}^{-1} from 60∘60^{\circ} to 0∘0^{\circ}. Calculate the work done by an external agent during this rotation. (a) +7.5×10−25 J+7.5\times10^{-25}\,\text{J} (b) +1.5×10−24 J+1.5\times10^{-24}\,\text{J} (c) −7.5×10−25 J-7.5\times10^{-25}\,\text{J} (d) −1.5×10−24 J-1.5\times10^{-24}\,\text{J}

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