# How do you find the magnetic field vector from the electric field vector?

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## How do you find the magnetic field of a vector?

The magnetic field is the curl of the vector potential. Find the magnetic field in a region with magnetic vector potential A ⃗ = sin ⁡ ( θ ) r ^ − r θ ^ .

## What is the relation between electric field vector and magnetic field vector?

The poynting vector is important because it aligns the three vectors of an electromagnetic wave: the electric field, the magnetic field, and the direction of propagation. These three vectors are mutually perpendicular; that is, each is perpendicular to the other two.

## How do you find the electric field from a magnetic field?

F = q (E + v × B). The electric displacement D and magnetic intensity H are related to the electric field and magnetic flux density by the constitutive relations: D = ε E, B = µ H.

## What is the relation between magnetic field and electric field?

A magnetic field is a field explaining the magnetic influence on an object in space. A electric field is a field defined by the magnitude of the electric force at any given point in space. Current is the rate of charge moving past a region.

## What is the relation between electric field and magnetic field in Emwave?

But in an EM wave, the electric field and magnetic field carry the same energy. So in an EM wave, the magnitude of the electric field is proportional to the magnitude of the magnetic field, and the proportionality constant is c, the speed of light!

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## What is the relationship between a magnetic field and an electric field in induction?

A changing magnetic flux induces an electric field. Both the changing magnetic flux and the induced electric field are related to the induced emf from Faraday’s law.