The electric potential at a distance of $3 \,m$ on the axis of a short dipole of dipole moment $4 \times 10^{-12}$ coulomb-meter is ......... $mV$
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(b)
$V=\frac{9 \times 10^9 \times 4 \times 10^{-12}}{9}=4 \times 10^{-3} \,V =4 \,mV$
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