A charge \( \mathrm{Q} \) is placed at each corner of a cube of sid...
A charge \( \mathrm{Q} \) is placed at each corner of a cube of side
P \( a \). The potential at the centre of the cube is:
W
(1) \( \frac{8 Q}{\pi \varepsilon_{0} a} \)
(2) \( \frac{4 Q}{4 \pi \varepsilon_{0} a} \)
(3) \( \frac{4 Q}{\sqrt{3} \pi \varepsilon_{0} a} \)
(4) \( \frac{2 Q}{\pi \varepsilon_{0} a} \)
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