engineering recuitment MP Vyapam Sub Engineer Mock Test 2024 Electromagnetic Theory Electrostatics Electrostatic Field
A cube of side ‘a’ has point charges +Q located at each of its vertices except at the origin where the charge is –Q. The electric field at the centre of cube is:
1
\(\frac{2 Q}{3 \sqrt{3} \pi \varepsilon_0 a^2}(\hat{x}+\hat{y}+\hat{z})\)
2
\(\frac{Q}{3 \sqrt{3} \pi \varepsilon_0 a^2}(\hat{x}+\hat{y}+\hat{z})\)
3
\(\frac{-2 Q}{3 \sqrt{3} \pi \varepsilon_0 a^2}(\hat{x}+\hat{y}+\hat{z})\)
4
\(\frac{-Q}{3 \sqrt{3} \pi \varepsilon_0 a^2}(\hat{x}+\hat{y}+\hat{z})\)