# What is the ratio of electric and magnetic?

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The ratio of the electric to magnetic fields in an electromagnetic wave in free space is always equal to the speed of light.

## What is the ratio of electric and magnetic field?

Hence, we conclude that the ratio of electric field and magnetic field in the EM wave is equal to speed of light in free space. Note: In an EM wave, the magnetic energy density is equal to the electrical energy density.

## What is the ratio of magnetic?

The relation between SI unit and CGS unit of magnetic field is given as 1T = 104G. Thus, ratio of magnetic field at the centre of a current carrying coil of radius R and at a distance of 3 R on its axis is 10√10.

## What is the relation between magnetic and electric?

Electricity and magnetism are two related phenomena produced by the electromagnetic force. Together, they form electromagnetism. A moving electric charge generates a magnetic field. A magnetic field induces electric charge movement, producing an electric current.

2×108.

## What are the dimensions of electric field?

Or, E = [M1 L1 T2] × [I1 T1]1 = [M1 L1 T3 I1]. Therefore, the Electric Field is dimensionally represented as [M1 L1 I1 T3].

## What is electric field formula?

Electric field can be considered as an electric property associated with each point in the space where a charge is present in any form. An electric field is also described as the electric force per unit charge. The formula of electric field is given as; E = F /Q.

## What is formula of magnetic moment?

The magnitude and direction of the torque is given by the equation. τ=p×B. The SI unit for magnetic moment is clearly N m T−1. If an electric current I flows in a plane coil of area A (recall that area is a vector quantity – hence the boldface), the torque it will experience in a magnetic field is given by. τ=IA×B.

## What is meant by magnetic moment?

: a vector quantity that is a measure of the torque exerted on a magnetic system (such as a bar magnet or dipole) when placed in a magnetic field and that for a magnet is the product of the distance between its poles and the strength of either pole.

## When A magnetic field is applied on A stationary electron it?

A stationary electron cannot make current. As the electric field is steady, there is no magnetic field. The magnetic field B is defined in terms of force on moving charge in the Lorentz force law. The SI unit of the magnetic field is Tesla.

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## What are the similarities and differences between electric and magnetic fields?

Similarities between magnetic fields and electric fields: Electric fields are produced by two kinds of charges, positive and negative. Magnetic fields are associated with two magnetic poles, north and south, although they are also produced by charges (but moving charges). Like poles repel; unlike poles attract.

## What is the symbol of magnetic field?

Index to magnetic terms & units in the SI

Quantity name Quantity symbol Quantity symbol
magnetic field strength H Φ
magnetic flux density B χρ
magnetic moment m J
magnetic susceptibility χ M

## Do magnets have an electric field?

Magnets only work on motion

A single particle with electric charge, sitting all by its lonesome, not doing anything interesting, will generate an electric field. … This field, which for the sake of convenience we’ll call the magnetic field, is thus both caused by moving charges and only affects moving charges. 