Question
Physics Question on Electromagnetic induction
The electric field and the potential of an electric dipole vary with distance 'r' as
A
1/r2 and 1/r3
B
1/r and 1/r2
C
1/r3 and 1/r2
D
1/r2 and 1/r
Answer
1/r3 and 1/r2
Explanation
Solution
Electric field and electric potential at a general point at a distance r from the centre of the dipole is
Eg= 1/4πϵo.p/r3 √(3cos2 θ +1)
And, Vg= 1/4πϵo.p cos θ/r2
Hence, D is the correct option.