1820, Hans Christian Oersted, a Danish physicist had discover the magnetic effect of current carrying conductor (wire) as it pass through a current, and it will effect the magnetic field around the wire. [search from references book]. His discover led to inventions of dynamo, motor and telephone is due to electromagnetism. As a bar magnet, it has its own magnetic field around it and magnetic field lines. The properties of magnetic field lines is it always flow from North pole to South pole. North pole
we need to advance the potential capabilities of the magnet and fully understand how we can harness the magnet. In my research I looked at how a magnet works, the physics behind a magnet, the magnetic fields of Earth, why can’t magnets be used as energy, and magnets for pain relief benefits. Magnetic Field of Earth: During the times of the ancient Greeks, they discovered stones that had the capacity to attract metals such as iron which is believed to be iron that had been electrically magnetized
It’s the magnetic field that extends from the earth’s interior to where it meets the solaria stream of charged particles emanating from the sun. The magnetic field resembles the field of a large bar magnet near its center or that due to a uniformly magnetized sphere. Its origin is thought to be generated deep down in the earth’s core. At the surface of the earth, the pole of this equivalent bar magnet, nearest the north geographical pole is actually a south” magnetic pole. This paradoxical situation
writing this paper is two fold. Goal one is to try and understand how a stationary magnet exerts force by means of a magnetic field (even across a complete vacuum). Frequently, electromagnetic fields are compared to the gravitational field. Goal two is to explore the similarities between the two types of fields to see if comparison throws any light on the mechanism of magnetic field generation. The term action-at-a-distance is often used to describe forces that travel through space and exert their
that ____________ mediated by magnetic fields. What causes magnetism? Scientist have two theories: the Doman Theory and the Atonic theory. The Doman theory explains what happens inside the materials when they are magnetized. In an unmagnetized aerial the domains are randomly arranged so there is an overall magnetic field. When you magnetize a material by shooting a bar magnet over it repeatedly in the same direction, the domains re-arrange so their magnetic fields align. The other theory is the
The hard drive uses two important principles about the magnetic fields. When we write data onto the hard drive Cit uses the law of electromagnetic induction and some material is magnetic. The hard drive uses two important principles about the magnetic fields. When we write data onto the hard drive it uses the law of electromagnetic induction and some material is magnetic. When we read data from the hard drive, it uses the Lenz's law. How hard disk drive works: Firstly we should
These changes greatly F magnetic the state of substances and can also influence the strength of magnetic fields. This is because it can alter the flow of electrons through the magnet. Electric currents produce magnetic fields, they can be as small as macroscopic currents in wires, or microscopic currents in atomic orbits caused by electrons. The magnetic field B is described in terms of force on a moving charge in the Lorentz force law. The relationship of magnetic field and charges leads to many
The Earth’s magnetic field is a major component to exploring the earth. The north and the south poles have always been a guide for travelers. Using compasses, the direction of the north pole and the south pole has always been provided by the magnetic force of the magnetic field. What many people do not know though is the earth’s magnetic field provides way more than that. The magnetic field, also known as the magnetosphere, protects us from all kinds of harmful substances. Some of these substances
In this experiment, we are able to study about magnetism and magnetic fields. Magnetism is very useful in our daily life. A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. In addition, magnetic field is a region which a magnetic material experiences a force as the result of the presence of a magnet or a current carrying conductor. Current carrying conductors also known as wire. As we know there have north pole and south pole of a
misconceptions and the confusions regarding the magnetic and the electric polarization. For instance, there is a misconception that “a magnetic field exerts a force on both the steady and the moving objects” (Fernandez and Wai-Yim 344), this is not the case always. The other misconception is that “magnets attract all metals.” This assumption is also false Polarization applies to both the electric charges and the magnetic charges. Not all metals are magnetic, different metals have a different orientation
(emf) in a conductor as a result of a changing magnetic field about the conductor and is a very important concept. Faraday discovered that, whenever the magnetic field about an electromagnet was made to grow and collapse by closing and opening the electric circuit of which it was a part, an electric current could be detected in a separate conductor nearby. Faraday also investigated the possibility that a current could be produced by a magnetic field being placed near a coiled wire. Just placing the
doesn't move. The rotor spins in the magnetic field contained in the stator. HOW WORKS A MOTOR? The force that that turns the armature comes from the magnetic field of the armature trying to line up with the external magnetic field of the stator. This force is called torque. This torque will cause the armature to turn until its magnetic field is aligned with the external field, but no further. How does the armature continue to spin? One of the magnetic fields must be changed so that the armature
The History of Magnets and Electromagents Magnets and electromagnets have many uses, every electric motor, generator or transformer requires a magnetic field for it's operation. With the exception of a few special types, all use electromagnets. The magnets mounted on large cranes are used to lift heavy loads. Magnetism makes the generator supplying the electricity to your home work and the radio
unnoticed is the magnetic strip on credit and debit cards. These have a certain magnetic makeup, that is why you are to keep them away from other magnets. Magnets are also used in many motors, in such items like a dishwasher, DVD and VHS players, and a pager or cell phone vibrator. Magnets are all dipoles, that is they all have both a north and a south pole. No known magnetic monopoles exist. Looking at magnets from a basic point of view, opposites attract and similars repel. Magnetic field lines always
him to great discoveries that changed the world. One of the most important findings for the future of both technology and the field of physics was Faraday’s breakthrough of the electromagnetic induction and his discovery of the magnetic field. His concept of induction looks at the way changing magnetic fields can cause the current to flow in wires. Any change in the magnetic environment of a coil wire will cause a voltage to be induced in the coil. No matter how much is changed, a voltage will be
experiments. Part one of the lab started us on our journey. In this part we took an apparatus with wire wrapped around it put a compass in the middle of the wire wraps. The setup was arranged so that the wraps were running parralel with the magnetic field of the earth, that is they were north-south. With this setup we
of electric motors operation, electromagnetics. One can create an electromagnet by running an electric current through a wire which in turn will create a magnetic field. An electromagnet may only be a temporary magnet but it has the same magnetic properties as a permanent magnet. Any magnet creates a magnetic field and this magnetic field will contain two ends or polls, one North and one South. The fundamental law of magnets states that ?Opposites attract and likes repel? and the same holds
Magnetic Levitation and Propulsion through Synchronous Linear Motors MagLev technology is entirely different from any form of transportation in operation today, but the basic principles that lie at the foundation are not beyond the understanding of the beginning electricity and magnetism student. It is in the application of these principles to design and optimize an actual train that things get hairy. The basic idea has been researched since the mid-sixties, but it is only now that economically
movement and trajectory of an electron that moves perpendicular to a magnetic field and measure the charge-to-mass ratio of an electron. Abstract An electron beam was fired through a magnetic and electric field. These two fields are connected to two power supplies and these power supplies are altered. The alteration of these voltages will change the strength of the electric and magnetic fields. Varying the magnetic and electric fields will change the trajectory of the electron. From this it can be shown
Maxwell’s Equations are a set of four equations that govern all of electromagnetism. The equations show a unification of the electric and magnetic fields and are often considered one of the greatest unifications in physics, describing one of the four fundamental interactions, the electromagnetic force. The unification of the electric and magnetic forces in the 19th century by Maxwell’s Equations led to several scientific advancements – including an entire new branch of physics, electromagnetism