Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
Share
Notifications

View all notifications

A Small Plane Area is Rotated in an Electric Field. in Which Orientation of the Area, is the Flux of the Electric Field Through the Area Maximum? in Which Orientation is It Zero? - Physics

Login
Create free account


      Forgot password?

Question

A small plane area is rotated in an electric field. In which orientation of the area, is the flux of the electric field through the area maximum? In which orientation is it zero?

Solution

The flux of an electric field `vec"E"` through a surface area `triangle vec"S"` is given by Δ Ø = `vec"E" . triangle vec"S" `, where ΔØ is the flux . Therefore , ΔØ= E Δ S  Cos θ .

 Here , θ  is the angle between the electric field `vec"E" ` and the normal to the surface area. 

Thus, for the flux to be maximum, cos θ should be maximum. Thus, for θ = 0, the flux is maximum, i.e. the electric field lines are perpendicular to the surface area.
The flux is minimum if θ = 90. Thus, cos θ = 0 and, hence, flux is also 0. Thus, if the electric field lines are parallel to the surface area, the flux is minimum.

  Is there an error in this question or solution?

APPEARS IN

Video TutorialsVIEW ALL [2]

Solution A Small Plane Area is Rotated in an Electric Field. in Which Orientation of the Area, is the Flux of the Electric Field Through the Area Maximum? in Which Orientation is It Zero? Concept: Electric Flux.
S
View in app×