Is Magnetism A Contact Force

'Opposites attract,' every bit the saying goes. You've probably heard this phrase a lot. Simply what is it that makes opposites attract? Where did this term come up from? This expression is derived from the magnet and its magnetic field. A magnet's opposing poles attract one other. In reality, shouldn't opposing poles repel and like poles attract? Isn't that correct? 'No,' you say. So, let u.s.a. put your theory to the test.

A magnetic field is the unseen space that exists around a magnetic object. A magnetic field describes the distribution of magnetic force around a magnetic object.

Magnetic fields are formed or produced when an electric charge/current flows most a magnet. Subatomic particles having a negative charge, such as electrons, travel almost, producing a magnetic field. These fields can emerge from the atoms of magnetic objects or from electrical cables or wires.

What is Magnetism?

A bar magnet pulls iron things to its poles, which are the ends of the magnet. The north pole is at 1 end, while the south pole is at the other. Magnetism is a phenomenon induced by the strength exerted by magnets, which produces fields that attract or repel other metallic objects. It occurs as a result of electrically charged particles. The force acting on electrically charged particles in a magnetic field is adamant by the amount of the charge, the particle's velocity, and the strength of the field. According to magnetism:

Like poles repel each other.
Reverse poles attract each other.

When two bar magnets are brought shut together, the like poles repel each other while the different poles concenter.

Magnetic field

When a positively charged particle moves in a homogeneous magnetic field, the particle's velocity is perpendicular to the field. The magnetic force always operates in a direction perpendicular to the accuse's motility.

The magnetic field is the space or region around a magnet in which magnetic force is practical on another magnet.

The magnetic field tin can be represented in a variety of ways. Information technology may be represented mathematically every bit a vector field that can be displayed equally various sets on a grid. Another method is to utilise field lines. Lines link the vectors in the set. Magnetic field lines never cross one other and never come to a halt hither.

A magnetic compass is used to locate the magnetic field of a bar magnet. A magnetic compass does not deflect when maintained away from a magnet. When you bring a magnetic compass closer to a magnet, it deflects. If the magnetic field lines in a specific location are very near to 1 other, the magnetic field is very potent; if the magnetic field lines are very far apart, the magnetic field is very weak. It is denoted past the unit Tesla.

Magnetic Field Unit and Measurement

The magnetic field is measured by determining its intensity and management. The measurement is required because each magnetic field differs from the others. Magnetic field intensity varies from tiny and weak to extremely powerful and huge. When we look at the Earth'south magnetic field, nosotros can see that information technology is faint still significant.

Nonetheless, the word magnetic field refers to two distinct but related fields, represented by the symbols H and B. H is the magnetic field strength and is measured in amperes per metre, the SI unit. Meanwhile, B denotes magnetic flux density and is expressed in tesla.

Magnetic Field Lines

Field lines are some other method to display the information independent inside a magnetic vector field. Magnetic field lines are fictitious lines.

Magnetic field lines are a type of visual representation of magnetic fields. They describe the magnetic forcefulness direction on a north monopole at whatever particular point.

The magnitude of the field is indicated by the density of the lines. For example, at the poles of a magnet, the magnetic field is stronger and denser. It becomes weaker as we go abroad from the poles, and the lines become less thick.

Magnetic Field Line Properties

Magnetic field lines never cross 1 other.
Magnetic field lines are always closed loops.
The density of the field lines reflects the field'southward intensity.
Magnetic field lines always arise from or brainstorm at the due north pole and end at the s pole.

Magnetic force

The magnetic force is the attraction or repulsion force that exists between electrically charged particles equally a result of their move.

The magnetic strength betwixt two moving charges is defined as the strength imposed on ane's charge past the magnetic field generated by the other. This strength is responsible for magnets attracting or repelling ane another.

A compass, a motor, the magnets that keep things on the fridge, railway lines, and new roller coasters are all examples of magnetic forcefulness. A magnetic field is created by all moving charges, and the charges that travel across its areas experience a forcefulness. Depending on whether the force is bonny or repulsive, information technology might be positive or negative. The magnetic force of an particular is determined by its charge, velocity, and magnetic field.

Force on a moving accuse

A accuse will feel a force if information technology travels at an angle across a magnetic field. The equation is:

F = q v B sin θ

Hither,

q is the charge,

B is the magnetic field,

v is the velocity, and

θ is the angle between the magnetic field and velocity directions.

A forcefulness acts on the motility of charge q travelling with velocity v in a magnetic field, and this force is:

perpendicular to sinθ where θ denotes the angle formed by v and B
proportional to the accuse q
perpendicular to both B and v
proportional to the velocity v

Right-Manus Dominion

The Correct-hand rule can be used to determine the force direction (F).

It refers to devices that create currents by moving in a magnetic field.

Indicate your pointer finger towards the direction of charge v'southward motility.
Between v and B, rotate your eye finger away from your index finger.
Hold your thumb parallel to the airplane produced by your index and heart fingers.
If the accuse q is positive, your thumb volition betoken in the direction of the force (F).

Sample Questions

Question 1: What is the magnetic force of twoscore C charged particles travelling at v grand/s in a magnetic field of 2 T? Its field's direction is the same as the route of the second particle.

Answer:

Given:

Charge, q = 40 C

Velocity, v = 5 chiliad ⁄ s

Magnetic Field, B = 2 T

Considering the second particle's road difference is the same as the direction of its field, θ =0°

The force, F= q v B sin θ = 40 × iii × 1 × sin 0° = 0.

Hence, the magnetic force of charged particles is 0 Due north.

Question two: What exactly is magnetic strength?

Answer:

The magnetic force betwixt 2 moving charges can be defined every bit the touch of one charge's magnetic field on the other.

Question iii: What is the significance of magnetic flux lines?

Respond:

Magnetic flux lines are meaning for the following reasons:

They indicate the magnetic field'due south direction.

The intensity of a magnetic field is proportional to the number of magnetic field lines present in a given region.

Magnetic field lines are lines in a magnetic field whose tangent at each location indicates the field management at that place and whose density gives the field magnitude.

The strength of the magnetic field is proportional to the number of magnetic field lines. Because the lines are higher about the poles, the magnetic field is greater there.

Question 4: Are magnetic fields present in space?

Answer:

Yes, magnetic fields exist in infinite. Based on observations of a big number of pulsars and the polarisation of their radio waves, the spiral arms of the Galaxy announced to comprise a very large-scale structured magnetic field. Magnetic fields have been discovered in interstellar dust clouds. The fields are magnified when the clouds collapse.

Question five: What is the source of the Earth's magnetic field?

Answer:

The magnetic field of the Earth is created deep inside the Globe's core. The movement of liquid atomic number 26 in the Earth'southward core generates an electric current, which generates magnetic fields. Charged metals travelling beyond these fields generate their own electric currents, and the cycle continues. The geodynamo is the name given to this self-sustaining bicycle. The Coriolis strength causes spiralling, which aligns unlike magnetic fields in the same direction. The combined activity of magnetic fields creates a massive magnetic field that engulfs the globe.