# Question: Can An Electric Field Exist In A Vacuum?

## Is Gold the best conductor of electricity?

Gold conducts heat and electricity.

Copper and silver are the best conductors, but gold connections outlast both of them because they do not tarnish..

## Why do electric field lines never cross?

If the lines cross each other at a given location, then there must be two distinctly different values of electric field with their own individual direction at that given location. This could never be the case. … Consequently, the lines representing the field cannot cross each other at any given location in space.

## 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.

## How electric field is created?

Electric fields originate from electric charges, or from time-varying magnetic fields. … The electric field is defined mathematically as a vector field that associates to each point in space the (electrostatic or Coulomb) force per unit of charge exerted on an infinitesimal positive test charge at rest at that point.

## What is the fastest thing in the universe?

And, while light is still by far the fastest thing in the universe, moving at a staggering speed of 299791.82 km/h, the following list contains some of the other closest things to reach that title of “World’s Fastest.”

## What is difference between magnetic and electric field?

The magnetic field is an exerted area around the magnetic force. While the electric fields are generated around the particles which obtain electric charge. … During this process, positive charges are drawn, while negative charges are repelled.

## Can you have a magnetic field without an electric field?

No you can have a magnetic field without an electric field. … This will result in a magnetic field but no electric field.

## What is the fastest thing in the world?

Laser beams travel at the speed of light, more than 670 million miles per hour, making them the fastest thing in the universe.

## Can electricity pass through air?

Normally, air is a good electrical insulator, so charges can’t flow through it (that is, electricity can’t conduct through air). However, at a certain point enough energy builds up to go through air, and the result is the spark that jumps between the wires.

## 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.

## 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 a single charge create an electric field?

Electric field near a point charge. … Think of one charge as producing an electric field everywhere in space. The force on another charge introduced into the electric field of the first, is caused by the electric field at the location of the introduced charge.

## 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.

## What happens to electricity in a vacuum?

Electricity is a flow of electrons. Electrons can flow across a vacuum. … In a CRT the cathode is heated, which gives the electrons the energy they need to escape the cathode. A large electric field then accelerates the free electrons across the vacuum and onto a target (screen).

## 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.

## Why does an electric field generate a magnetic field?

As Ampere suggested, a magnetic field is produced whenever an electrical charge is in motion. The spinning and orbiting of the nucleus of an atom produces a magnetic field as does electrical current flowing through a wire. The direction of the spin and orbit determine the direction of the magnetic field.

## Can you have electricity in space?

Spacecraft that orbit Earth, called satellites, are close enough to the Sun that they can often use solar power. These spacecraft have solar panels which convert the Sun’s energy into electricity that powers the spacecraft. The electricity from the solar panels charges a battery in the spacecraft.

## 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.

## 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.

## Where is the electric field the strongest?

The relative magnitude of the electric field is proportional to the density of the field lines. Where the field lines are close together the field is strongest; where the field lines are far apart the field is weakest. If the lines are uniformly-spaced and parallel, the field is uniform.