# What is electric field and magnetic field in physics?

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

## What is a magnetic field a level?

A magnetic field is a region surrounding a magnet or current carrying wire which acts on any other magnet or current carrying wire placed in the field. Magnetic field lines always form loops.

## What is an electric field a level physics?

An electric field is a region of space in which charged particles are subject to an electrostatic force. Static Electricity and Induced Charges. These forces can be shown to exist by generating a static charge on an object, for example, rubbing a glass rod with a silk cloth.

## What is the relationship between electric and magnetic fields?

Key Takeaways: Electricity and Magnetism Together, they form electromagnetism. A moving electric charge generates a magnetic field. A magnetic field induces electric charge movement, producing an electric current. In an electromagnetic wave, the electric field and magnetic field are perpendicular to one another.

## What is the formula of magnetic field?

H = B μ − M Where, B is the magnetic flux density. M is the magnetization. μ is the magnetic permeability.

## What is the formula of electric field?

E = F q test = k | Q | r 2 . This equation gives the magnitude of the electric field created by a point charge Q. The distance r in the denominator is the distance from the point charge, Q, or from the center of a spherical charge, to the point of interest.

## What is basic difference between magnetic and electric field?

Both electric and magnetic fields are the consequence of the attraction and repulsion of electric charges. However, a magnetic effect is caused by moving electric charges while an electric field is caused by stationary charges.

## What are the two main theories of magnetism?

Ferromagnetism and ferrimagnetism occur when the magnetic moments in a magnetic material line up spontaneously at a temperature below the so-called Curie temperature, to produce net magnetization.

## What is the unit of magnetic field?

Magnetic field is denoted by B and H. The SI unit of H is amperes per metre and the SI unit of B is Newtons per metre per ampere or Teslas.

## What is Coulomb’s law a level physics?

Coulomb’s law states that the electric force is directly proportional to the product of the charges and inversely proportional to the squared distance between them.

## Is electric field a vector?

The electric is a vector quantity. We know that electric field is the ratio of force per unit test charge. Since, force is a vector quantity, electric field is also a vector quantity.

## What are the units of electric field?

The SI unit of the electric field is volts per metre (V/m). This unit is equivalent to Newton’s per coulomb. These are derived units where Newton is a unit of force and Coulomb is the unit of charge.

## Can an electric field exist without a magnetic field?

So, both the electric and magnetic fields exist without each other. So, we conclude that magnetic fields can exist without electric fields and electric fields can also exist without magnetic fields. Note: Electric and magnetic fields are both the components related to electromagnetic waves.

## Why electric field is perpendicular to magnetic field?

Why are electric and magnetic fields perpendicular to each other? The magnetic field is along the axis of electrons spin, meaning it always has to be perpendicular to the movement of the electrons, it’s a nature of the behavior of charges and waves.

## Which is more stronger electric field or magnetic field?

The one created by electric field is independent form particle velocity, while the Lorentz force is proportional to particle velocity. Thus at v=0 the electric part of force acting on particle is infinitely stronger than magnetic part.

## What creates a magnetic field?

Magnetic fields are produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin.

## What is the unit of magnetic charge?

Magnetic charge” (i.e. the magnetic counterpart of electric charge) is actually called pole strength. In SI units, the units depend on how pole strength is defined. If defined as the force per unit B field, the SI units are ampere-meter^2 (A m^2).

## What is the symbol for electric field?

The electric field is represented by the symbol E. The SI unit of the electric field is newton per coulomb which is equal to volts per meter.

## What is the unit of electric flux?

Electric flux is a scalar quantity and has an SI unit of newton-meters squared per coulomb ( N · m 2 /C N · m 2 /C ).

## What is electric field in simple words?

An electric field is a region of space around an electrically charged particle or object in which an electric charge would feel force. An electric field is a vector quantity and can be visualized as arrows going toward or away from charges.

## What is the right hand rule in physics?

Moving charges We can remember this diagram using the right-hand rule. If you point your pointer finger in the direction the positive charge is moving, and then your middle finger in the direction of the magnetic field, your thumb points in the direction of the magnetic force pushing on the moving charge.

## What are the properties of magnetic field lines?

Magnetic field lines appear to emerge or start from the north pole and merge or terminate at the south pole. Inside the magnet, the direction of the magnetic field lines is from the south pole to the north pole. Magnetic field lines never intersect with each other. Magnetic field lines form a closed-loop.

## What are the 3 types of magnets?

There are three types of magnets: permanent magnets, temporary magnets, and electromagnets. Permanent magnets emit a magnetic field without the need for any external source of magnetism or electrical power.

## What are 4 properties of magnets?

• Magnets will attract ferromagnetic substances.
• Like poles of the magnet repel each other and unlike poles attract each other.
• A suspended magnet always comes to rest in the north-south direction.
• The poles of the magnet are in pairs.

## What are the basic laws of magnetism?

Like poles (north-north; south-south) will repel each other. Unlike poles (north-south) will attract each other.