Question

Consider an electric field Vector E E₀x = ˆ r where E₀ is a constant. The flux through the shaded area (as shown in the figure) due to this field is

Answer 1

Correct option: (c)

Explanation:

Given Vector E = E₀ X

This shows that the electric field acts along + x direction and is a constant. The area vector makes an angle of 45° with the electric field. Therefore the electric flux through the shaded portion

Comments

How angle is 45

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take the slanted side as hypotenuse, projection of slanted side as base and height of slanted side as height of right angled triangle. cos theta =a/root2 x a which means theta is 45