Question 133: Electrostats & Capacitance

Question

The potential energies associated with four
orientations of an electric dipole in an electric
field are
(i) $$-5U_0$$ (ii) $$-7U_0$$ (iii) $$3U_0$$ (iv) $$5U_0$$
where $$U_0$$ is positive. Rank the orientations according to the angle between the electric dipole moment p and electric field E, greatest first

Accepted Answer

We know that, potential energy of electric dipole,
$$U=-p~.~E=-pE\cos	heta$$
When, $$90  {	heta _{(iii)}}}$$
When $$0^\circ   	heta_{(ii)}}$$
Therefore, $$\mathrm{	heta_{(iv)} > 	heta_{(iii)}} > \mathrm{	heta_{(i)} > 	heta_{(ii)}}$$.

Answer

(i), (ii), (iii), (iv)

Answer

(ii), (iii), (i), (iv)

Answer

(iv), (iii), (i), (ii)

Answer

(iv), (i), (iii), (ii)

Electrostats & Capacitance

The potential energies associated with four orientations of an electric dipole in an electric field are (i) $-5U_0 (ii) -7U_0 (iii) 3U_0 (iv) 5U_0 where U_0$ is positive. Rank the orientations according to the angle between the electric dipole moment p and electric field E, greatest first

Choose the correct answer: