In a region of space, the electric field is given by `vecE = 8hati + 4hatj + 3hatk`. The electric flux through a surface of area 100 units in the xy plane is

Options

A. 800 units
B. 300 units
C. 400 units
D. 1500 units

Answer

B

Explanation

`vec(E) = 8hat(i) + 4hat(j) + 3hat(k), d vec(s) = 100 hat(k)`
`phi = vec(E).dvec(s) = (8 hat(i) + 4hat(j) + 3hat(k)).(100 hat(k)) = 300` units