1) An electric field is needed to produce an electric current. 2) A potential difference between two points is needed to produce an electric current. … 4) The electric field is constant along all parts of the circuit when a steady current is flowing.

## What does it mean when the electric field is constant?

Related to your specific question, if the electric field is constant, then the slope of the potential is a constant which means that **the potential is changing linearly**. If the potential is constant, then the slope of the potential is zero, which means the electric field is zero.

## Is current in A wire constant?

The **current can remain constant if the voltage** difference between any two points in the circuit is given by where is the resistance between those two points (this is just Ohm’s law; the instead of is to make it clear that it’s the voltage difference, not the absolute level, that matter).

## Is electric field conserved?

The work done to carry a test charge (q) from point A to another point B in the field due to Q does not depend upon the path followed. Electric field depends upon the initial and final positions A and B. **Electric fields are independent of the path followed**. So we say that the electric field is conservative in nature.

## How do you know if an electric field is constant?

A constant electric field is **one whose (partial) derivative with respect to time is zero**. That is, it does not change in time. A uniform electric field is one whose (partial) derivative with respect to any spatial variable is zero. That is, the field is the same in magnitude and direction throughout space.

## Can electric field be negative?

**Electric field is not negative**. It is a vector and thus has negative and positive directions. An electron being negatively charged experiences a force against the direction of the field. For a positive charge, the force is along the field.

## Is there an electric field in a wire?

Although a wire is a conductor, **there is no electric field in it just because it is capable of conducting current**! If you connect a battery to the ends of the wire, the battery voltage creates an electric field that, in deed, causes the electrons in the wire to move and try to “neutralize” the electric field.

## How does electricity flow in an electric circuit?

The direction of an electric current is by convention the **direction in which a positive charge would move**. Thus, the current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery. Electrons would actually move through the wires in the opposite direction.

## What does an electric circuit need?

To produce an electric current, three things are needed: a supply of electric charges (electrons) which are free to flow, **some form of push to move the charges through the circuit and a pathway to carry the charges**. The pathway to carry the charges is usually a copper wire.

## Why electric field is conserved?

Electric charge is carried by subatomic particles such as electrons and protons. … In particle physics, charge conservation means that **in reactions that create charged particles, equal numbers of positive and negative particles are always created**, keeping the net amount of charge unchanged.

## Can electric field be Nonconservative?

Specifically, the induced electric field is nonconservative because it does net work in moving a charge over a closed path, whereas the **electrostatic field is conservative** and does no net work over a closed path.

## Can electric charge be lost?

Electric charge, which can be positive or negative, occurs in discrete natural units and **is neither created nor destroyed**.