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The figure shows a point charge +Q placed at the center of an imaginary hemispherical surface of radius R. A uniform electric field E is applied in the horizontal direction. If the net electric flux passing through the hemispherical surface is zero, and if the magnitude of the electric field $E = \frac{Q}{n π \in_{0} R^{2}}$ , then find the value of ‘n’

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answer is 2.

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Detailed Solution

$\frac{q}{2 ε_{0}} = E π R^{2}$

$E = \frac{q}{2 π ε_{0} R^{2}}$

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