episode: magnetic homer starring mayank gulati jagseer natt pulkit gulati the simpsons

Episode: Magnetic Homer Starring Mayank Gulati Jagseer Natt Pulkit Gulati THE SIMPSONS

Magnet Concepts Magnetic Fields of Conductors Domain Theory Magnetic Force on Conductors Electromagnetic Induction Magnetic Force on Moving Charges

Magnetic Fields of Conductors Electromagnets Electric current flowing through wires creates magnetic fields in circles around the wire, perpendicular to the wire based on the right hand rule. When wire is coiled around in circles and then current is applied, all of the segments of the wire create fields that can add up to virtually act as a bar magnet. The straightness and strength of the solenoids field lines depends on the tightness of the coiled wires and the amount of current flowing through, with the field being the strongest at the center of the loops. The direction of the field is determined similarly using the right hand rule, perpendicular to individual wires. The biggest advantage of such electromagnets is the level of control of strength and even the ability to turn it off.

Domain Theory Fridge Magnets Ferromagnetic substances are made of many tiny magnetic domains, each acting like its own bar magnet. When the substance is not magnetic, all of the domains are in random orientations with none dominating. But if the substance is placed in a strong enough magnetic field, the domains can rotate and align with the external field. This causes the material to behave like a magnet. When the external field is removed, whether or not the orientation will remain, depends on the material. If the orientation remains the material becomes a permanent induced magnet, whereas if it returns to random order, the material was only a temporary magnet. Many metals display such properties and are attracted to magnetic material. If a paperclip is on a magnet, it itself can act as attract others.

Magnetic Force on a Conductor Maglev Trains Magnetic fields apply forces to conductors that have a current running through them and are submerged in a magnetic field as described by the equation Where F is the magnitude of the force acting on the conductor I is the current in the conductor l is the length of the conductor B is the magnitude of the magnetic field is the angle between the conductor and the field lines This force is in the direction as determined by the right hand rule with respective directions being the North to South field lines and conventional current flow.

Although steady current can produce a steady magnetic field, a steady magnetic field cannot directly induce a current in a conductor. Electric current in conductors is actually induced by the change in a magnetic field, known as the law of electromagnetic induction. Currents can be produced in loop of wire rotated in uniform magnetic field and connected to galvanometer in ammeter configuration. If a permanent magnet is passed through loops of wire, as the wires experience the change in the field around them, they will have current. Electromagnetic Induction Electric Generator Coil The induction occurs in conductors perpendicular to the field, not parallel.

With the knowledge that current acts upon magnetic fields (specifically, a wire with current can create a magnetic field), Newtons third law dictates that a magnetic field must also act upon Current, or moving charges In a magnetic field, moving charged particles experience a centrifugal force to the component of their velocity perpendicular to the field. The force only changes the direction and not the magnitude of the velocity, thus it only works when the charges are moving, or if current exists. Magnetism on Moving Charges Television Tubes

Particle Collider Mass Spectrometer 686F6D65

Particle Colliders accelerate protons to near light speed and collide them to study the true building blocks of matter and other advanced theorems. Although electrostatic forces are used to actually accelerate these particles, since the tube travelled by the proton is a circle, magnets are used to steer these particles in the right direction. Particle Colliders Forces on Moving Charges

A mass spectrometer is used to split a sample into its various ions based on the mass of the ion. This is done by charging the sample and passing it through a field Since the force of a magnet on charged particles is a centrifugal force dependant on the mass/charge ratio, the uniformly charged ions split up based on their mass as they pass through the field. This is demonstrated in the picture Mass Spectrometer Forces on Moving Charges

Anti-Lock Brake System Speakers Televisions Fridge Magnets

ABS is a safety feature in all modern cars that ensures highest traction of tyres while breaking by computerizing the pressure control of a brake pad To do this, the system must keep an accurate measure of every individual wheels instantaneous speed without actually touching the wheel and creating friction. This is achieved by monitoring field fluctuations created by magnetic teeth mounted around the wheel. Anti-Lock Braking System Magnetic Field Detection

Attraction and repulsion Speakers need to create vibration in the air to produce sound, done by pushing and pulling the cone. The force behind this is magnetic attraction and repulsion An electromagnet interacts with a permanent magnet, where alternating current can create different polarities in the electromagnet, causing the permanent magnet to be pulled and pushed at the frequencies of the sound required. Speakers

CRT televisions work by firing electrons on a coating that glows certain colors upon being hit. Since there is only a limited number of electron guns in a TV, powerful electromagnets are used to steer these electrons Controlled magnets can accelerate the electrons to hit just the right part of a film to create the color needed as they are fired, at up to 60Hz. If an external magnet is brought close to an older CRT TV, color distortion can be easily seen Television Tubes Forces on Moving Charges

Ferromagnetism Fridge magnets are the most common use of ferromagnetism, using magnetic materials to stick to a steel refrigerator. Though these are not constructed the same as normal magnets Constructed in the Halbach array arrangement, fridge magnets alternate poles as north and south. This effectively gives the back side double the magnetic strength in the same surface area, while eliminating the field on the front side. This can be easily felt when rubbing it with regular magnets. Fridge Magnets

Generator Transformers Nuclear Fusion

Nuclear Fusion is a very powerful way of planned electric generation, and is currently prototyped in a doughnut shaped enclosure filled with hot ionized plasma to accelerate particles To easily control both the hot ionized plasma and the particles involved in fusion; wires can be wrapped around the enclosure to induce an electromagnetic field within it; thus successfully navigating the plasma using centrifugal force. Forces on Moving Charges

Electric Generator Coil Electromagnetic Induction Using electric generation coil is the method of producing electricity in most all ways including hydro, coal, wind and any other turbine/rotating technology This works based by having conductive coils spin in a magnetic field where the magnets can induce AC into the coil. In a circle, since the two sides move in opposite direction, the induced voltages at the ends add. The actual amount of induced voltage is based on Faradays Law

Transformers Michael Faraday A transformer can be used to step-up or step-down electrical voltage to change from high generation voltages to residential use voltages of 120V in the electrical grid. It works by having two sets of coils wrapped around an iron core, with the output voltage depending on the amount of wire on one end relative to the other. The AC current in the input induces a changing magnetic field, allowing induction of current on the other end at different voltages.

Super Conductivity Developed in the 1970s, MRI machines use strong magnets and radio frequencies to alter magnetic alignments of bodily atoms. As the protons return to their normal electromagnetic spin at different rates, medical imaging can be produced This magnetic field can be as strong as 2 Teslas, created using superconductors cooled to create almost no resistance, allowing current to create the strongest of magnets. Magnetic Resonance Imaging

Aurora Lights The charged particles stay in place as the changing strength of the earths field creates a magnetic mirror. As the atmospheric particles collide with these charges, they release photons creating the magnificent northern and southern lights. Charged particles from solar winds spiral around the earths magnetic field lines until they collect up near the north and south poles. Forces on Moving Charges

Earths Magnetic Field William Gilbert Sir William Gilbert described Earths magnetic field as a large bar magnet at a slight angle to the earths axis. This fairly weak field enables compasses and protects the earth from solar winds Although it is not completely understood how the field is created, it is theorized to be induced by the rotation of the liquid iron inside of the earths core creating magnetic phenomenon about its axis.

Diamagnetism All matter has slight tendencies to create a magnetic field opposite to an externally applied one, causing repulsion. This repulsion is regardless of the polarity of the field. Paramagnetism/ Ferromagnetism This occurs due to the orbital velocity of electrons around their nuclei, changing the magnetic dipole moment when in a field. According to Lenz's law, this opposes the external field. And thus all matter, even water, is slightly repulsive to all magnets

Generally Regarded as the father of magnetism and electricity, being an astronomer, Gilbert discovered the earths natural magnetic field. This explained how a compass needle works and debunked many other theories. William Gilbert (1540-1603) Earths Magnetic Field

Coulomb studied electrostatic forces, attraction and repulsion between charged objects. He found that this depends on the inverse square of the distance and directly on the charges itself. this is called the Coulombs Law and is the basis for all electrostatic applications today Charles De Coulomb (1736-1806) Electrostatics

While studying magnetism, faraday discovered the basis of electromagnetic fields, induction, diamagnetism, electrolysis and the interaction of light and magnetism. Faradays ring, his invention using varying coils of wire around an iron ring to change voltage was the first working transformer. Michael Faraday (1791-1867) Electromagnetic Induction

Found the right hand rule of direction of induced current as perpendicular to the magnetic field lines, or that it opposes the change causing it. This is called the Lenz Law and demonstrates how electromagnetic circuits always follow Newtons third law. Heinrich Lenz (1804-1865) Lenz Law

James Clerk Maxwell (1831-1879) Best known for formulating the classical electromagnetic theory, uniting electricity, magnetism and light as one in Maxwells equations, he has been called the father of modern physics. He also proved that electromagnetic fields (and thus light) can self sustain and travel through space as waves. Maxwells Equations

Maglev Trains Magnetic Levitation Trains use various technologies such as flux tunnels created by superconductors or special arrays of magnets set up to both repel/levitate the train off the tracks and attract/propel it forwards. This achieves two things: Eliminating friction to make acceleration easier, and creating movement from powerful electromagnets for much faster speeds. Magnetic and Dynamic Suspension

MDH - Yamato 1 Created in 1991 by The Japanese Mitsubishi Group, the Yamato 1 is the first boat to successfully propel itself without using any moving parts It does by applying magnetic fields to electrically conductive liquid, seawater. The force that the magnetic field applies on these moving charges pushes the boat forward. This is known as MDH propulsion. Forces on Moving Charges

episode: magnetic homer starring mayank gulati jagseer natt pulkit gulati the simpsons

Documents

steady magnetic field

uniform magnetic field

magnetic material

magnetic homer

external field

tiny magnetic domains

steady current

south field lines