# Do Electric Fields Exist In A Vacuum?

## Do electric fields extend through a vacuum?

1) YES, electric fields exist and can extend/propagate through a vacuum.

Reasoning: Why not there is no difference between a vacuum and space just that a vacuum has no air in it.

Vacuums are still made of matter so the electric field should still extend into that space.

The vacuum is not made of matter..

## Can an electric field exist in empty space?

So Electric Fields are vectors (they have magnitude and direction) Electric Fields surround electric charges. Electric Fields exist in empty space (think of fields as a property of space!) … The E-field is present whether or not you bother putting q there. It is present at any (and every) point in space.

## Can a magnetic field exist in a vacuum?

Both electric and magnetic fields can be produced in a vacuum – but not any electric or magnetic field. … So, no, any field cannot exist in a vacuum, only some fields.

## Does electricity exist in space?

Electricity doesn’t exist in space in the usual way we think about it, namely electrons flowing in a wire. But that’s only because space normally doesn’t have wires. … These charged electrons and ions interact with each other (opposite charges attract) and with the magnetic field of the Sun.

## Can an electron travel in a vacuum?

Electricity is a flow of electrons. Electrons can flow across a vacuum. … They need to leap because the vacuum is a perfect insulator and so there is no medium in which they can flow (like through a metal conductor) so they must aquire all of the energy necessary to cover the distance before they can escape the cathode.

## Is it possible for an electric field to exist at some point in space at which there is no charge?

Q20 Is it possible for an electric field to exist at some point in space at which there is no charge? Yes, all we need to have is a charge somewhere in space that can exert a force on a positive test charge brought to that point in space.

## What causes an electric field?

Electric fields are caused by electric charges, described by Gauss’s law, or varying magnetic fields, described by Faraday’s law of induction. Together, these laws are enough to define the behavior of the electric field as a function of charge repartition and magnetic field.

## Can magnetic field exist without electric field?

No you can have a magnetic field without an electric field. Consider a rod with an equal number of positive and negative charges (such that they are equally spaced). Let the positive move to the left with speed v and the negative to the right with speed v. This will result in a magnetic field but no electric field.

## How fast does electricity travel in a vacuum?

Light travels through empty space at 186,000 miles per second. The electricity which flows through the wires in your homes and appliances travels much slower: only about 1/100 th the speed of light.

## Does electricity need a medium?

Electricity is flow of electrons. Electrons can flow in vaccum too. So electricity doesn’t require medium. But it becomes easier to handle and manipulate electricity if it is flowing through a medium ( e.g. copper wire) for us.

## Can electricity pass through a vacuum?

Even at low voltages, electricity can in fact travel through a perfect vacuum. At low voltages though electrons flow invisible. A vacuum arc can occur if the electric field is sufficient to cause field electron emission.

## Can lightning exist in a vacuum?

Lightning as we know it in air cannot happen in vacuum because lightening depends crucially on the generation of positive ions and negative electrons by ionization of molecules of the air in high electric fields (and eventually high temperatures) and the ensuing impact ionization typical for a gas discharge.