Can you have a negative electric flux?

The negative flux just equals in magnitude the positive flux, so that the net, or total, electric flux is zero. If a net charge is contained inside a closed surface, the total flux through the surface is proportional to the enclosed charge, positive if it is positive, negative if it is negative.

What does it mean to have negative flux?

Remember our convention for flux orientation: positive means flux is leaving, negative means flux is entering. In this example, water is falling downward, or entering the tube. This means the top surface has negative flux (it appears to be siphoning up water).

How do you know if flux is positive or negative?

Flux: The flow across a surface

1. When the field vectors are going the same direction as the vectors normal to the surface, the flux is positive.
2. When the field vectors are going the opposite direction as the vectors normal to the surface, the flux is negative.

When electric flux is positive and negative?

If more lines are leaving than entering the flux is positive and if more lines are entering than leaving the flux is negative. Net Electric Flux Through a Closed Surface Page 4 4 Recall: The number of electric field lines entering or leaving a charge is directly proportional to the magnitude of the charge.

How does electric flux due to a point charge?

How does the electric flux due to a point charge enclosed by a spherical Gaussian surface get affected when its radius is increased? That is, on increasing the radius of the gaussian surface, charge q remains unchanged. So, flux through the gaussian surface will not be affected when its radius is increased.

What do you mean by positive and negative magnetic flux?

Magnetic flux is a scalar quantity and its positive/negative sign indicates the direction of the magnetic field.

Why does Faradays law have a negative?

Faraday’s law can be written: The negative sign in Faraday’s law comes from the fact that the emf induced in the coil acts to oppose any change in the magnetic flux. Lenz’s law: The induced emf generates a current that sets up a magnetic field which acts to oppose the change in magnetic flux.

What does the negative mean in Faradays law?

The minus sign in Faraday’s law of induction is very important. The minus means that the emf creates a current I and magnetic field B that oppose the change in flux ΔΦ—this is known as Lenz’s law.

How does the electric flux electric field enclosing a given charge varies when the area enclosed by the charge is doubled?

If the area is doubled, the electric flux will also gets doubled. When area enclosed by the charge is doubled, A’ = 2A. New electric flux is given by : So, if the area is doubled, the electric flux will also gets doubled.