Sadly, I can't remember the name of who's 'Law' this is
in Electricity and Magnetism, but it says that the net
flux passing through a closed surface is equal to the
net charge inside.
In the picture, the net charge inside the surface is ( + q - q ) = Zero.
So it must follow, as the night follows the day, the net flux
through the surface is Zero. (D)
Answer:
Double the charge to 2Q
Explanation:
The magnitude of a electric field caused by a charge Q at a distance R can be find by the following expression:
Where K is the Coulomb constant.
As the relationship between the charge and the electric fiel is proportional, by simply doubling the charge, you would double the magnitude of the electric field.
Notice that the distance affects the magnitude of the electric field by the inverse square. So if you half the distance, the magnitude of the field will quadruple.