AP EAMCET · PHYSICS · Electrostatics
A dipole is placed in a uniform electric field, its potential energy will be minimum when the angle between its axis and field is
- A zero
- B \(\pi\)
- C \(\frac{\pi}{2}\)
- D \(2 \pi\)
Answer & Solution
Correct Answer
(A) zero
Step-by-step Solution
Detailed explanation
Potential energy of a electric dipole in electric field is given as \[ U=-p B \cos \theta \] For minimum value \(U, \cos \theta\) should be maximum as 1 . i.e., \(\cos \theta=1=\cos \theta^{\circ} \Rightarrow \theta=0^{\circ}\)
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