Question

Calculate the potential at a point p due to a charge 0f 4*10to the power 7 c located 9 cm away

Answer 1

Answer--->

$q=4\times10^{-7}$

$r=9cm=9\times10^{-2}m$

$v=\dfrac{1}{4\pi{E}} \dfrac{q}{r}$

$v=\dfrac {9\times10^{9}\times4\times10^{-7}}{9\times10^{-2}}$

$v= 4\times 10^4$