Question

A disk with a radius of R is oriented with its normal unit vector at an angle\Theta with respect to a uniform electric field. Which of the following represent the electric flux through the disk? A: E(πR^2)cosϕ B: E(πR^2)sinΘ C: E(πR^2)cosΘ D: E(2πR)sinΘ E: E(2πR)cosΘ F: E(πR^2)sinϕ

Answer 1

Answer:

option (A)

Explanation:

electric flux is defined as the number of electric field lines which crosses through any area.

It is given by

Ф = E . A (It is the dot product of electric field vector and area vector)

According to the question, the angle between electric filed vector and area vector is θ.

So, electric flux

Ф = E x π R^2 Cosθ