COMEDK2020PhysicsElectrostatics
The potential energies associated with four orientations of an electric dipole in an electric field are (i) -5 U₀ (ii) -7 U₀ (iii) 3 U₀ (iv) 5 U₀ where U₀ is positive. Rank the orientations according to the angle between the electric dipole moment p and electric field E , greatest first
Options
- A(i), (ii), (iii), (iv)
- B(ii), (iii), (i), (iv)
- C(iv), (iii), (i), (ii)
- D(iv), (i), (iii), (ii)
Correct answer
C. (iv), (iii), (i), (ii)
Step-by-step solution
We know that, potential energy of electric dipole, U=- p E =-p E When, 90 _ (i i i) When 0^ _ (i i) Therefore, _ ( iv ) > _ ( iii ) > _ ( i > _ (if ) .