CBSE Class 12 Physics 2023 Delhi Set 1 Paper

Question : 22

Total: 35

Depict the orientation of an electric dipole in (a) stable and (b) unstable equilibrium in an external uniform electric field. Write the potential energy of the dipole in each case.

Solution: 👈: Video Solution

(a) Stable equilibrium: When angle between

→

and

→

is 00

Potential energy of dipole =−pE‌cos‌θ
In this case θ=0∘, so Potential energy =−pE
(b) Unstable equilibrium: When angle between

→

and

→

is 180∘.

Potential energy of dipole =−pE‌cos‌θ
In this case θ=180∘, so Potential energy =pE

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