This question involves the concepts of electric potential, charge, and distance.
The electric potential is "48 V".
The electric potential of a point in the vicinity of a charge is given by the following formula:
[tex]V=\frac{kq}{r}[/tex]
where,
Therefore,
[tex]V = \frac{(9\ x\ 10^9\ Nm^2/C^2)(1.6\ x\ 10^{-19}\ C)}{3\ x\ 10^{-11}\ m}[/tex]
V = 48 volts
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