# How do you find the electric flux of a sphere?

Contents

## What is the electric flux of a sphere?

Considering a Gaussian surface in the form of a sphere at radius r > R, the electric field has the same magnitude at every point of the surface and is directed outward. The electric flux is then just the electric field times the area of the spherical surface.

## How do you calculate electric flux?

Know the formula for electric flux.

1. The Electric Flux through a surface A is equal to the dot product of the electric field and area vectors E and A.
2. The dot product of two vectors is equal to the product of their respective magnitudes multiplied by the cosine of the angle between them.

## Why do we calculate flux?

It is a useful tool for helping describe the effects of the magnetic force on something occupying a given area. The measurement of magnetic flux is tied to the particular area chosen. We can choose to make the area any size we want and orient it in any way relative to the magnetic field.

## How do you find electric flux through A square?

We can calculate the flux through the square by dividing up the square into thin strips of length L in the y direction and infinitesimal width dx in the x direction, as illustrated in Figure 17.1.

THIS IS UNIQUE:  Can you vent an electric dryer inside?

## How do you calculate the electric flux on an open surface and uniform electric field?

If the electric field is uniform, the electric flux passing through a surface of vector area S is ΦE=E⋅S=EScosθ Φ E = E ⋅ S = ES cos ⁡ where E is the magnitude of the electric field (having units of V/m), S is the area of the surface, and θ is the angle between the electric field lines and the normal ( perpendicular ) …

## What is the electric flux through the upper face of the box?

The electric flux through the top face (FGHK) is positive, because the electric field and the normal are in the same direction. The electric flux through the other faces is zero, since the electric field is perpendicular to the normal vectors of those faces.

## What are the SI units of electric flux?

Electric flux is a scalar quantity and has an SI unit of newton-meters squared per coulomb ( N · m 2 /C N · m 2 /C ).