Magnetic Flux

Consider a closed curve enclosing an area A (as shown in the figure). Let there be a uniform magnetic field B in that region. The magnetic flux through the area A is given by2.PNG

Φ = B.A = B A CosΘ

where Θ is the angle which the vector B makes with the normal to the surface. If B is perpendicular to A, then the flux through the closed area A is zero.

SI unit of magnetic flux is weber (Wb).

Notes :

  • Area vector is ⊥ to the surface.
  • For open surface choose one direction as the area vector direction and stick to it for the whole problem.
  • For closed surfaces outward normal is taken as area vector direction
  • Flux is basically count of number of lines crossing a surface
  • 3.PNG                            [because magnetic field lines exists in closed loop.]

 

 

1 thought on “Magnetic Flux

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this:
search previous next tag category expand menu location phone mail time cart zoom edit close