q find the electric potential at a distance 009 m
Q. Find the electric potential at a distance 0.09 m from a charge of 4 X 10-7 C.
The electric potential V = ( 1/4πεo ) q /r = ( 9 X 109 X 4 X 10-7)/ 9 X 10-2 = 4 X 104 volt.
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