Question

The electric field and the potential of an electric dipole vary with distance $r$ as

• A. $\frac{1}{ r ^{2}}$ and $\frac{1}{ r ^{3}}$
• B. $\frac{1}{ r ^{3}}$ and $\frac{1}{ r ^{2}}$
• C. $\frac{1}{ r }$ and $\frac{1}{ r ^{2}}$
• D. $\frac{1}{r^{2}}$ and $\frac{1}{r}$

Answer 1

Answer: (B)

$E = K \frac{2 p }{ r ^{3}} \propto \frac{1}{ r ^{3}}$
$V = K \frac{ p \cos \theta}{ r ^{2}} \propto \frac{1}{ r ^{2}}$