Is Magnetic Flux Zero: 7 Important Facts You Should Know


Is magnetic flux zero, we can say that the Magnetic flux is zero when they are passed through a closed surface area. When the plane of the paper is placed in a parallel direction to the magnetic field, there is no passage for field lines to travel through the paper, leading to zero magnetic flux.

Is magnetic flux zero can be found by knowing the concept of magnetic flux in detail. Magnetic flux is a term used in physics to determine the number of magnetic field lines traveling through a certain area in the magnetic field range.

Magnetic Flux: Definition

Magnetic flux in physics can be defined as the total number of lines that can move through some specific region and is referred to be the magnetic flux.

The total amount of magnetic field lines that travel through a certain area can be termed magnetic flux. It is always dependent on the area of the field and the direction in which the lines travel, that help in the generation of the magnetic field. The SI unit of the magnet flux is generally termed to be weber (Wb).

Important facts and properties of Magnetic Flux

There are several important facts and properties of magnetic flux. Some of the useful properties are listed below,

  • The magnetic field lines in a magnetic flux always form a closed loop.
  • Usually, the magnetic field lines always start from the north pole and then move towards the south pole.
  • Magnetic field lines present in a magnetic flux do not overlap one another.
  • Magnetic flux can be positive and negative depending on the direction of movement.
  • Magnetic field lines in magnetic flux in the same direction repel each other.
  • Can vary magnetic flux over the surface area.
  • We can expand and shrink the area of the loop that alters the magnetic flux, and it can increase or decrease.
  • Using the magnetic flux formula, we can find the angle between the area and the magnetic field vector; if we take the dot product between are and the field vector, we can measure the angle.
is magnetic flux zero
Magnetic Field Lines around the magnet

Can we say that magnetic flux is a vector quantity?

Magnetic flux is one of the important vector quantities. It is generally measured and denoted by the SI unit Tesla. It consists of the direction in which the field lines move and can estimate their magnitude.

Magnetic flux is an important concept to be understood in magnetism. It is useful in understanding the wider concepts of magnetic fields, and it helps to understand the intrinsic properties of many magnetic materials.

is magnetic flux zero
Magnetic Flux in an area

How can you explain in detail the concept of magnetic flux?

Magnetic flux is the measure of the net magnetic field lines that pass through the given region in a magnetic field. It is one of the important concepts related to magnetism.

It is a useful tool that is important to describe and understand the effects of the magnetic force on an object in a certain region. The measure of magnetic flux is wholely dependent on the area selected.

Can magnetic flux be zero?

Whenever the magnetic field lines travel through any of the closed surface areas, the magnetic flux in that area is considered zero.

It happens because all the magnetic field lines that enter the particular surface will equal the number of magnetic field lines that move out of the surface. In another case, the magnetic flux can be zero when the magnetic field is placed in the parallel direction to the surface, and then the magnetic flux generated there will be zero.

Magnetic Flux

Why is the magnetic flux zero?

The magnetic flux around any magnetic field region will be zero because as soon as the magnetic field lines are generated, they are made to travel across the surface, and if the number of field lines that pass through the region is almost equal in number to the number of field lines living the region.

If the total net charge in any closed surface area is zero, then all the magnetic field lines will be directed toward the surface to the inwards and later directed to the outer region of the surface. Then there is the generation of negative and positive flux that cancels out one another, leading to the magnetic flux being zero.

When is the magnetic flux zero?

The magnetic flux generated around a magnetic field in a closed surface area will be zero when the number of magnetic field lines leaving the surface will equal several magnetic field lines that enter the surface.

Magnetic field lines will be directed toward the surface to the inwards and later directed to the outer region of the surface. The generation of negative and positive flux cancels out one another, leading to the magnetic flux being zero.

How is the magnetic flux zero?

The magnetic flux around any magnetic field generated area will be zero because as soon as the magnetic field lines are generated, they are made to travel across the surface, and if the number of field lines that pass through the region will be almost equal in number to the number of field lines living the region.

Suppose the total net charge around any closed surface area is zero. In that case, all the magnetic field lines will be directed towards the surface to the inner region and later to the outer region of the surface. Then there is a generation of negative and positive flux that cancels out one another, leading to the magnetic flux being zero.

At what angle is magnetic flux zero?

At 90 degrees, we can find the magnetic flux to be zero. I can easily understand it with the help of simple formula of magnetic flux.

The magnetic field lines move perpendicularly in the magnetic field region, and then we can use the following equation,

                                                   ϕ = BAcos(Θ)

Here,

ϕ indicates the magnetic flux generated in the surface area

B refers to the strength of the magnetic field around the area

A is indicated as the area of the loop

Θ is referred to be the angle between the magnetic field lines and the surface of the loop.

In this formula, if we substitute 90 degrees for cos Θ, we get the answer to be zero; that is, the magnetic flux is zero.

                                                                 ϕ = BA cos(90)

                                                                 ϕ = BA cos(0)

                                                                 ϕ = 0

Since it is a closed loop and magnetic field lines are normal to the region, the magnetic flux is observed to be zero.

Can magnetic flux be zero even when the magnetic field is not zero?

Magnetic flux can be zero even when a magnetic field is not zero because, in the presence of a magnetic field, only magnetic field lines can be generated that together constitute the magnetic flux.

When there is a presence of a magnetic field, then the generation of magnetic field lines takes place. If it is a closed region, the field lines that direct to the inner surface are directed towards the outer region, i.e., an equal number of magnetic field lines enter and exit the region. Leading to magnetic flux is zero.

Is magnetic flux always zero?

Magnetic flux in a closed loop or any closed region is always zero. Apart from that, the magnetic flux in any other region will have some value, only in the cases where the number of magnetic field lines entering the region will be the same as the number of magnetic field lines that leaves the region.

In the case of any closed area, the field lines that direct to the inner surface is directed towards the outer region, i.e., an equal number of magnetic field lines enter and exit the region. They are leading to magnetic flux being zero.

When is the magnetic flux not zero?      

The magnetic field lines constitute a magnetic flux, and the magnetic flux that passes through an open surface will not be zero since there is no equal number of field lines entering and leaving the area.

If there is an equal movement of magnetic field line both while entering and exiting that too in a closed area, the magnetic flux of any object will be considered zero. If the surface of the area around the magnetic field is open, then the magnetic flux will not be zero.

is magnetic flux zero
Image Credit: Pixabay free images

Can the magnetic flux be negative?

Magnetic flux can be negative when the magnetic field lines enter the selected area, i.e., there is a chance of them entering the loop.

Magnetic flux can be positive and negative depending on whether they enter or exit the magnetic field region. When the magnetic field lines enter the magnetic field, it is negative and then move out of the region; they are considered positive.

When does the magnetic flux occur?

If there is a magnetic field in a certain area, then surely there is a presence of magnetic field lines that passes through the region, leading to the emergence of magnetic flux.

It also depends on the angle at which the magnetic field lines enter and leave the region. These magnetic field lines move in the form of a closed loop that contributes to the magnetic flux, which is why magnetic flux takes place.

Conclusion

Therefore, we can conclude by saying that Magnetic flux is zero when they are passed through a closed surface area. When the plane of the paper is placed in a parallel direction to the magnetic field, there is no passage for field lines to travel through the paper, leading to zero magnetic flux.

Raghavi Acharya

I am Raghavi Acharya, I have completed my post-graduation in physics with a specialization in the field of condensed matter physics. Having a very good understanding in Latex, gnu-plot and octave. I have always considered Physics to be a captivating area of study and I enjoy exploring the various fields of this subject. In my free time, I engage myself in digital art. My articles are aimed towards delivering the concepts of physics in a very simplified manner to the readers. Let’s connect through - LinkedIn: https://www.linkedin.com/in/raghavi-c-s-260a801b1 EMAIL ID: raghavics6@gmail.com

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