Surface integrals and line integrals

[superkraken]

Homework Statement

when we calculate the electric field due to a plane sheet or the magnetic field due to a wire,are we calculating it at a single point or the whole field due to the total wire?

Homework Equations

The Attempt at a Solution

 

[kuruman]

You are calculating the field at a single point by adding contributions from the entire plane or wire.

 

[SammyS]

Homework Statement

when we calculate the electric field due to a plane sheet or the magnetic field due to a wire,are we calculating it at a single point or the whole field due to the total wire?

Homework Equations

The Attempt at a Solution

What method are you using in each of these cases?