A charge of $10 \,\mu C$ is placed at the origin of $x-y$ coordinate system. The potential difference between two points $(0, a)$ and $(a, 0)$ in volt will be
A charge of $10 \,\mu C$ is placed at the origin of $x-y$ coordinate system. The potential difference between two points $(0, a)$ and $(a, 0)$ in volt will be
- A
$\frac{9 \times 10^4}{a}$
- B
$\frac{9 \times 10^4}{a \sqrt{2}}$
- C
$\frac{9 \times 10^4}{2 a}$
- D
$0$
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