Is Magnetic Field Zero: 9 Interesting Facts


In this article, the topic, “is magnetic field zero” with 9 interesting several facts will be summarizing in a brief manner.

The value of the field which is magnetic can be zero. If the charge is become negative towards point of the compass of the force, then it is inversely to that accepted above. When force became zero in this particular case magnetic force absence can be observe.  Stationary charges not facing the force of the magnetic.

Can magnetic field be zero?

A movement of the charges and changing the field of the electric in both cases field of the magnetic can be generated.

Yes, magnetic can be zero. The changes of the field of the magnetic appeared by the reason of motion of the substance which is bring out a current in the coil of the wire which is directly proportional to the permutation in field.

The value of zero term as, the field of the magnetic remain unchanged in between the two region in a short time period, so in this case no current is bring out at the magnetic substance which is go through the coil.

Field of the magnetic can be termed as with the help of the magnetic field lines. It is an observation tool which is mainly used to observe the strength and point of the compass of the field of the magnetic.

Magnetic field:-

Magnetic field can be deriving as; a situation that can be observe in the area around an electric current or a magnet by the state of a data cable capacity of the magnetic at each and every point in the area and the state of magnetic poles.

S.I. unit for the magnetic field is Newton per meter per amperes or Tesla. The dimensional formula for the field of the magnetic is, [latex] M^1T^2I^-^1[/latex].

Formula of the magnetic field:-

The formula of the magnetic field is carried the constant, [latex] \mu_0[/latex]. The constant, [latex] \mu_0[/latex] define as, permeability of free area. The constant, [latex] \mu_0[/latex] value is, [latex] 4\pi \times 10^-^7 [/latex] Tesla meter per ampere.

So, the magnitude of the field of magnetic can be express as,

Magnitude of the field of magnetic = [latex] \frac{(Permeability of free area) (Current magnitude)}{2\pi (Distance)} [/latex]

[latex] B = \frac{\mu_0I}{2\pi r}[/latex]

Derivation of the formula of the magnetic field:-

B is denoted as, the magnitude of the magnetic field and unit is Tesla.

[latex] \mu_0[/latex] is denoted as, permeability of free area and unit is Tesla meter per ampere

I is denoted as, magnitude of the electric current and unit is Ampere.

r is denoted as, Distance and unit is meter.

Characteristics of the magnetic field lines:-

Some major characteristics of the magnetic field lines are listed below,

  • Magnetic field lines are never split with each other.
  • The tangents which are stretched to the magnetic field lines are generate the point of the compass of the field of the magnetic.
  • Magnetic field lines are produced a loop in a closed manner.
  • The density for the magnetic force lines is directly proportional with the strength of the magnetic field.
  • Any magnets inside the magnetic field lines are goes from the direction of the South Pole to the direction of North Pole.
  • The magnetic field lines have both magnitude and direction at any portion of the field of magnetic for this particular reason the magnetic field lines are vector.
  • Magnetic field lines are pointed the direction of the field of the magnetic. In the both North and South poles the magnetic field became more strong the reason behind of it is the magnetic field lines are more near dense when they placed at these poles.

When is magnetic field zero?

The field of the magnetic will be zero when any change of charges neither is nor generate during the current flow through a coil. If the value of the sin 180 degree will be zero the magnetic field will be zero.

In the case of when force is applied on a wire, in where current is already carried by the wire, in this particular case the angle between the wire and magnetic field’s direction will be stay at 180 degree for this reason the value will be became zero.

Some examples of the magnetic field are,

  • Motor
  • New roller coaster
  • Train tracks
  • Refrigerator
  • Microwave
  • Speakers
  • Car
  • Computer
  • Magnetic Resonance Imaging scanner (MRI scanner)
  • Earth

Why the magnetic is field zero?

In the case of when force is applied on a wire, in where current is already carried, in this particular case the angle between the wire and magnetic field’s direction will be stay at  180 degree and the value will be zero.

The value of the sin 180 degree is zero, for this reason when the force is applied on the wire where current is already present that is the area where the value of magnetic field will be zero.

The ways of generate magnetic field:-

Mainly with the help of three ways the magnetic field can be generate. The ways are listed below,

  • If current is carried by a solenoid or a loop.
  • If current is carried by a coil.
  • A magnetic bar, horse shoe magnet or round shaped magnet.

How the magnetic is field zero?

If an element’s atom has four numbers of electrons around the nucleus of the element in different four orbits. The electrons of the element will be revolving in the region of the nuclease and also turning about concerning their own axis. In this case, the total amount of magnetic moment will be appearing for the both cases of revolutionary movement and turning about of the electrons around the nucleus.

is magnetic field zero
Image – The shape of the magnetic field produced by a horseshoe magnet is revealed by the orientation of iron filings sprinkled on a piece of paper above the magnet;
Image Credit – Wikipedia

Now, if the sum of the vector for the magnetic dipole moment, of all the four electrons is zero then the field of the magnetic will be also zero.

The magnets have two poles one is North Pole and other is one South Pole. The same poles of the magnets are attracting each other and the different poles are repelling each other. When an iron piece is rubbing with a magnet at that time north seeking poles of the atom in the piece of the iron line up in the similar point of compass.

The force is produce by the grouped atoms generates a field of the magnetic, in this way the field of the magnetic is actually work.

What happens when the magnetic field is zero?

The Lorentz force which is acting on a charge which movement is q in a specific area with a uniform field o electric E and uniform field of magnetic B is, [latex]F = q (E + v \times B)[/latex]. If the velocity of the charge remains unchanged then, in that region, the force is absent to apply.

If uniform field of electric E is zero, then [latex]v \times B[/latex] will be also zero. If [latex]B \neq 0[/latex] then the velocity v will be in the similar direction as the field of the magnetic is. So, we can explain that if the value of B is zero then the value E also be zero.

At what angle is magnetic field zero?

At the angle of sin 180 degree the magnetic field will be zero. When magnetic force is applied on a wire, at that particular time in that specific place current is already carried by the wire, in this particular case the angle between the wire and magnetic field’s direction will be stay at 180 degree for this reason the value of the magnetic field will be became zero.

The magnitude of the magnetic force can be express as, [latex]F = qvB sin\Theta[/latex]. In this expression the angle is less than 180 degrees among the magnetic field and the velocity. This incident indicates that, the force of the magnetic is move towards the parallel on a charge or a stationary charge and the magnetic field is became zero.

Will Earth ever lose its magnetic field?

Yes, earth can lose its magnetic field but totally the magnetic field of the earth cannot be disappearing. For the reason of pole reversal the magnetic field of the earth weakens but totally cannot be disappearing. Earth owes its magnetic field to its molten outer core, which is made mostly of iron and nickel.

This magnetic-field engine, known as a dynamo, has been chugging along for billions of years. Scientists think that the current core arrangement may have settled into place about 1.5 billion years ago, according to 2015 research that found a leap in the magnetic field’s strength around then.

Is magnetic field straightway zero?

Yes, the magnetic field straightway stays at the value of zero. A work for the magnetic force is exerted on a moving spot charged particle which is known as Lorentz force is straightway zero, just because of the force is straightway acted perpendicular to the velocity of the moving particle.

When is the magnetic field not zero?

If the velocity of the charge remains unchanged then, in that region, the force is absent to apply. If uniform field of electric E is zero, then [latex]v \times B[/latex] will be also zero. If [latex]B \neq 0[/latex] then the velocity v will be in the similar direction as the field of the magnetic is. So, we can explain that if the value of B is zero then the value E also be zero.

Conclusion:

In this article trying to clarify the concept about of the magnetic field. The earth is a big example of magnetic field. The value of the magnetic field can be zero under some condition for some particular time period but the value of the magnetic field never can be lose.

Indrani Banerjee

Hi..I am Indrani Banerjee. I completed my bachelor's degree in mechanical engineering. I am a enthusiastic person and I am a person who is positive about every aspect of life. I like to read Books and listening to music.

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