what produces a magnetic field? course hero

How does a magnetic field work?

This preview shows page 8 - 11 out of 12 pages. Question 18 What produces the magnetic field we measure in the coil? 4/5/2021 The current Correct! Correct! The computer software The temperature gradient between the ends of the coil. All of the above. 1 / 1 pts Question 19 The magnetic field strength of a long solenoid is 1 * 10 -4 T.

What causes a magnetic field in a conductor?

By symmetry , it is reasonable to think that B fields are also produced by moving charges A moving charge experiences a force in a B - field moving charge 1 generates B - field and exerts a force on moving charge. 1 generates B -field and exerts a force on Magnetic field by a moving charge: experimental facts • When q larger, and when v larger, larger B -field produced • B -field …

What is the source of magnetic field?

presence of that field. Magnetic field: 1) A moving charge or current creates a magnetic field in the surrounding space (in addition to E). 2) The magnetic field exerts a force F m on any other moving charge or current present in that field. - The magnetic field is a vector field vector quantity associated with each point in space.

What is the H-field of a magnetic field?

10 b State what other object produces a magnetic field pattern similar to that. 10 b state what other object produces a magnetic. ... Course Title SOCIAL SCIENCE 1, Uploaded By SuperHumanCrownNightingale7. Pages 14 This preview shows page 10 - 13 out of 14 pages.

What produces a magnetic field?

Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. Each atom has electrons, particles that carry electric charges. Spinning like tops, the electrons circle the nucleus, or core, of an atom.Jan 21, 2011

What always produces a magnetic field?

The fact that an electric current always produces a magnetic field, no matter what the shape of the circuit may be, was discovered accidentally by Oersted in 1820. He was demonstrating what he believed to be the non-connection between electricity and magnetism.

What produces a magnetic field quizlet?

What produces a magnetic field? Electric charges in motion. Charged particles in motion have both an electric field and magnetic field associated with them.

How can a magnetic field be produced Mcq?

8. How can a magnetic field be produced? Explanation: An electric current as well as the permanent magnet produces a magnetic field whereas a temporary magnet fails to do so. 9.

How is a magnetic field produced?

A magnetic field is produced by moving electric charges and intrinsic magnetic moments of elementary particles associated with a fundamental quantum property known as the spin . Magnetic field and electric field are both interrelated to each other and are components of the electromagnetic force, one of the four fundamental forces of nature.

How does the Earth's magnetic field work?

The Earth’s magnetic field is generated deep down the earth’s core. The flow of liquid iron at the core of the Earth generates an electric current which in turn produces magnetic fields. Charged metals passing through these fields go on to create electric currents of their own, and so the cycle continues.

What is magnetic field?

What is a Magnetic Field? Magnetic Field is the region around a magnetic material or a moving electric charge within which the force of magnetism acts. A pictorial representation of the magnetic field which describes how a magnetic force is distributed within and around a magnetic material. Symbol. B or H. Unit. Telsa.

When was the magnetic field discovered?

The research on the magnetic field began in 1269 when French scholar Petrus Peregrinus de Maricourt mapped out the magnetic field on the surface of a spherical magnet using iron needles. He noticed that the resulting field lines crossed at two points. He named these points “poles.”.

Who discovered that electric currents create magnetic fields?

In 1819, Danish physicist and chemist Hans Christian Orsted discovered that an electric current creates a magnetic field around it. In 1825, André-Marie Ampère proposed a model of magnetism where this force was due to perpetually flowing loops of current, instead of the dipoles of magnetic charge.

What is vector field?

The vector field is a set of many vectors that are drawn on a grid. In this case, each vector points in the direction that a compass would point and has a length that is dependent on the strength of the magnetic force. Vector Field of a Bar Magnet.

How does Ampere's law work?

As the current through the conductor increases, the magnetic field increases proportionally. When we move further away from the wire, the magnetic field decreases with the distance. This is described by Ampere’s law. According to the law, the magnetic field at a distance r from a long current-carrying conductor I is given by the equation

What is magnetic field?

A magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic. [Explain] Most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them.

Why do iron filings separate from each other?

The filings naturally separate from each other because similar poles repel each other. The result is a pattern that resembles field lines.

What are the four fundamental forces of nature?

Magnetism and magnetic fields are one aspect of the electromagnetic force, one of the four fundamental forces of nature. There are two basic ways which we can arrange for charge to be in motion and generate a useful magnetic field: We make a current flow through a wire, for example by connecting it to a battery.

Do magnetic field lines cross?

The field-line description has some useful properties: Magnetic field lines never cross. Magnetic field lines naturally bunch together in regions where the magnetic field is the strongest. This means that the density of field lines indicates the strength of the field.

What is the permeability of free space?

Here is a special constant known as the permeability of free space. . Some materials have the ability to concentrate magnetic fields, this is described by those materials having higher permeability. Since the magnetic field is a vector, we also need to know the direction.

Is magnetic field a vector?

The magnetic field is described mathematically as a vector field. This vector field can be plotted directly as a set of many vectors drawn on a grid. Each vector points in the direction that a compass would point and has length dependent on the strength of the magnetic force. [Explain compasses]

Who created the first magnetic field?

One of the first drawings of a magnetic field, by René Descartes, 1644, showing the Earth attracting lodestones. It illustrated his theory that magnetism was caused by the circulation of tiny helical particles, "threaded parts", through threaded pores in magnets.

How is the Earth's magnetic field produced?

The Earth's magnetic field is produced by convection of a liquid iron alloy in the outer core. In a dynamo process, the movements drive a feedback process in which electric currents create electric and magnetic fields that in turn act on the currents.

What is magnetic field?

t. e. A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.

How to determine the direction of a charge?

Using the right hand, pointing the thumb in the direction of the current, and the fingers in the direction of the magnetic field, the resulting force on the charge points outwards from the palm. The force on a negatively charged particle is in the opposite direction. If both the speed and the charge are reversed then the direction of the force remains the same. For that reason a magnetic field measurement (by itself) cannot distinguish whether there is a positive charge moving to the right or a negative charge moving to the left. (Both of these cases produce the same current.) On the other hand, a magnetic field combined with an electric field can distinguish between these, see Hall effect below.

Where is the south pole of the magnetic field?

The south pole of the magnetic field is near the geographic north pole of the Earth.

What is the magnetic field vector B?

The magnetic field vector B at any point can be defined as the vector that , when used in the Lorentz force law, correctly predicts the force on a charged particle at that point. :

When was Tesla invented?

In 1887, Tesla developed an induction motor that ran on alternating current (AC). The motor used polyphase current, which generated a rotating magnetic field to turn the motor (a principle that Tesla claimed to have conceived in 1882). Tesla received a patent for his electric motor in May 1888 as U.S. Patent 381,968. In 1885, Galileo Ferraris independently researched rotating magnetic fields and subsequently published his research in a paper to the Royal Academy of Sciences in Turin, just two months before Tesla was awarded his patent, in March 1888.

How are magnetic fields created?

Magnetic fields are created or produced when the electric charge/current moves within the vicinity of the magnet. Here, the sub-atomic particle such as electrons with a negative charge moves around creating a magnetic field.

What is magnetic field?

Magnetic Field and Magnetic Force. Magnetic field is an invisible space around a magnetic object. A magnetic field is basically used to describe the distribution of magnetic force around a magnetic object. Magnetic fields are created or produced when the electric charge/current moves within the vicinity of the magnet.

Why is it important to measure the magnetic field?

The measurement of the magnetic field involves measuring its strength and direction. The measurement is necessary because every magnetic field is different from each other. Magnetic field intensity is either small and weak while some are very strong and large. If we look at the earth’s magnetic field it is weak but large.

Which direction is a circular loop carrying a current in?

A circular loop carrying a current I in anti-clockwise direction lies in XY-plane with its centre at the origin. By using B.S.L, we are now calculating a magnetic field at point P.

What is the axial line of a magnet?

The axial line of a magnet is the line passing through both the poles of the magnet. Let us consider a bar magnet (NS) of magnetic length ‘2l’ and pole strength ‘m’ as shown in Fig.

How to depict magnetic field?

Magnetic field can be depicted in several ways. Mathematically, it can be represented as a vector field which can be plotted as different sets on a grid. Another way is the use of field lines. The set of vectors are connected with lines. Here the magnetic field lines never cross each other and never stop.

What is the N turn?

‘N’ turns are wound on a cylindrical tube having radius ‘a’ & length ‘L’, so closely that the surface of the cylindrical tube presents a surface current density ‘k’. Assuming each turn having a circular shape.