A circular loop of diameter `d` is rotated in a uniform electric field until the position of maximum electric flux is found. The flux in this position is measured to be `phi` .What is the electric field strength?

Options

A. `(4 phi)/(pi d^(2))`
B. `(2 phi)/(pi d ^(2))`
C. `(phi)/(pi d^(2))`
D. `(pi phi d^(2))/(4)`

Answer

A

Explanation

`phi = EA . Cos 0^(@) = E xx (pi d^(2))/( 4)" " :. E = (4 phi)/( pi d^(2))` .