A charge of 11 mu or micro CC is 10 cm above the center of a square of side length 20 cm. Find the flux through the square.

Explanation:

charge q = 11 x 10⁻⁶ C

If the  charge were  inside the square , according to Gauss's law

electric flux through the walls of square wiil be

= q / ε

Now , the charge is lying just on one of the faces of the square,(10 cm above the center of a square of side length 20 cm) , only half the flux as mentioned above  will pass through the square.

flux through the square

= 1/2 x  (q / ε)

= 1/2 x (11 x 10⁻⁶ / 8.85 x 10⁻¹²)

= .6214 x 10⁶ weber.

wavelength variability is the right one

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