# How Do You Find The Electric Field Inside A Wire?

To observe the direction of the field at any given point around the circumference of the wire, click and drag the compass needle, (its north pole red, its south pole blue). The direction of the magnetic field around the wire is also indicated by the small arrows featured on the individual field lines.

## How is the electric field of a wire calculated?

Note that there is no contribution from the two flat ends of the cylinder, since the field is parallel to the surface there. The right-hand side represents the total charge enclosed by the cylinder, divided by . It follows that The field points radially (in a cylindrical sense) away from the wire if , and radially towards the wire if .

## Is the electric field generated by a wire perpendicular to the surface?

Let us draw a cylindrical gaussian surface, co-axial with the wire, of radius and length --see Fig. 11. The above symmetry arguments imply that the electric field generated by the wire is everywhere perpendicular to the curved surface of the cylinder. Thus, according to Gauss' law, (70)

## How do you find electrical wires in walls?

Another practice of finding electrical wires behind walls is to use a metal detector. This can be an efficient method if you know there are very few wires and if there aren't many other metal objects, like nails, in the walls.

## What should be the electric field of a uniformly charged wire?

Consider a long straight wire which carries the uniform charge per unit length . We expect the electric field generated by such a charge distribution to possess cylindrical symmetry. We also expect the field to point radially (in a cylindrical sense) away from the wire (assuming that the wire is positively charged).

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