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The dipole is most stable when the angle between the dipole and the field is __________

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in Engineering Physics II by (679k points)
The dipole is most stable when the angle between the dipole and the field is __________

(a) 0°

(b) 45°

(c) 90°

(d) 180°

I had been asked this question in quiz.

My question is based upon Dielectric Polarisation in portion Dielectrics of Engineering Physics II

1 Answer

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Best answer
Correct option is (a) 0°

Explanation: The potential energy of a dipole is given by -pEcosθ. Thus the dipole would be most stable when potential energy would be minimum. Hence, when θ = 0, i.e., the dipole is aligned in the direction of the field, the dipole would be most stable.

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