# Electric fiel of wire carrying current

• waqarrashid33
In summary, there is usually an implicitly applied electric field in a current-carrying wire that is usually ignored for simple static problems. However, in the case of an alternating current, the current is excited by an electromagnetic wave that permeates the space around the wire. This wave does not penetrate the wire, as current is restricted to the surface. This property is also present in realistic conductors.
waqarrashid33
Is current carrying wire have any electric field?

Yes, there is usually an implicitly applied electric field in the wire itself that gives rise to the current. Usually this electric field is ignored for the purposes of a simple static problem. However, if we have an alternating current, then this current is excited by an electromagnetic wave that propagates between the wire and the return/ground. This electromagnetic wave permeates the space around the wire. By convention, we do not regard the fields to penetrate the wire. A perfect conductor restricts all currents to the surface of the wire and prevents any fields from being present inside the wire. A realistic conductor can still be reasonably estimated to have this property as well.

See this:

author = "Assis, A. K. T. and Rodrigues, W. A. and Mania, A. J.",
title = "The electric field outside a stationary resistive wire carrying a constant current",
journal = "Foundations of Physics",
year = 1999,
volume = 29,
number = 5,
pages = "729-753",

(I am not an author)

## What is an electric field?

An electric field is a physical field created by electric charges that exerts a force on other charges within the field. It is represented by a vector quantity and is measured in units of volts per meter (V/m).

## How is an electric field created by a wire carrying current?

An electric field is created by the movement of electric charges, which is known as current. When current flows through a wire, it creates a magnetic field around the wire, which in turn creates an electric field. This electric field can be measured at any point around the wire.

## What factors affect the strength of the electric field around a wire carrying current?

The strength of the electric field around a wire carrying current is affected by the amount of current flowing through the wire, the distance from the wire, and the material the wire is made of. The electric field strength decreases as the distance from the wire increases, and it is stronger for materials with higher conductivity.

## How can the direction of the electric field around a wire carrying current be determined?

The direction of the electric field around a wire carrying current can be determined using the right-hand rule. This rule states that if the thumb points in the direction of the current, the fingers will curl in the direction of the electric field.

## What are some practical applications of the electric field of a wire carrying current?

The electric field of a wire carrying current has many practical applications, including electromagnets, electric motors, and generators. It is also used in devices such as transformers, which are used to step up or step down the voltage of an electric current.

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