Essays Tagged: "Magnetic field"


8 that of the earth and it's average density is approximately equal to that of the earth. Mercury's magnetic field is one-hundred times weaker than that of Earth's. Mercury has the shortest revolution ...

(2 pages) 80 0 4.6 Feb/1997

Subjects: Science Essays > Astronomy

Lenz's Law and Magnetic Flux

's investigations. He found that the magnitude of the emf produced depends on the rate at which the magnetic flux changes. Faraday found that if the flux through N loops of wire changes by an amount , ... ion the induced emf acts. Experiment shows that an induced emf always gives rise to a current whose magnetic field opposes the original change in flux. This is known a Lenz's law. Let us apply it to t ...

(3 pages) 80 0 4.6 Jan/1997

Subjects: Science Essays > Physics

Title: Was the Moon Landing A Hoax? This report has information on the Moon Landings and if it was a hoax. Many research proofs support it.

American-Heritage definition reads, "Two zones of high-energy particle radiation trapped in earth's magnetic field and surrounding the planet, beginning at an altitude of about 800 kilometers and exte ...

(4 pages) 154 3 3.1 Apr/2002

Subjects: Science Essays > Astronomy

The Atom

itive anode. These particles could bedeflected by an electric field and bent into curved paths by a magnetic field. They weremuch lighter than hydrogen atoms and were identical 'what ever the gas thro ...

(6 pages) 69 0 3.0 Jan/1996

Subjects: Science Essays > Chemistry

Guitar Pickups By, Ernesto Sanchez A complete guide to the anatomy history invention and impact f guitar pickups.Includes Bibliography.

tizes the strings of the guitar. When the strings vibrate by playing them, the vibration causes the magnetic field, or the flux field, to move along with the strings.The motion of the magnetic field c ... y is the permanent magnet, once again, according to Encarta online "(a) Permanent magnet, remaining magnetic: a magnet that retains its properties after the magnetizing force has been removed from it. ...

(4 pages) 100 0 3.9 Jan/2003

Subjects: Art Essays > Music History & Studies

Electromagnetism: Physics, science 1 investigation.

IntroductionThe term magnet is defined as, an object made of a ferromagnetic material such as iron, with domains that are aligned one way. Thus, it has poles and a magn ... an be switched on and off are used in many electric machines. When any current flows, it produces a magnetic field.Were it not for the Earth's magnetic field, all life on the planet would be killed of ... xist.The creation and destruction of magnets is relatively easy to carry out. To create a magnet, a magnetic material (e.g. steel), and a solenoid are required.Place the steel into the solenoid, conne ...

(4 pages) 54 0 4.3 Mar/2003

Subjects: Science Essays > Physics

History of the Compass

A compass is an instrument, which displays the direction of the horizontal component of the Earth's magnetic field at the point of observation, by a freely suspended magnetic element. A compass usuall ... has these components:The compass card (figure 1), engraved around its edge in degrees or points;The magnetic assembly on which the card is mounted;The pivot on which the magnetic assembly is poised;Th ...

(9 pages) 90 0 4.3 Apr/2003

Subjects: Science Essays > Technology

How an electric generator works and what parts it consists of.

or looks almost identical to an electric motor. Each consists of a loop that is able to rotate in a magnetic field. The electric motor uses electrical energy to make the loops rotate which creates mec ... urrent within the loop.The way an electric generator functions is based on the principal of "electromagnetic induction". Electro magnetic induction is when you move a wire through a magnetic field cau ...

(2 pages) 62 0 3.7 Nov/2003

Subjects: Science Essays

Biography about Anders Celsius.

hts. He was the first person to suggest a connection between these lights and change in the earth's magnetic field. Anders Celsius died of tuberculosis in April 1744, only 42 years old. His grave is n ...

(3 pages) 30 0 4.6 Dec/2003

Subjects: Science Essays > Physics

Observing Stars.

le because of the emission and reflection of light. 'Light' is the better-known term for the electromagnetic spectrum, which includes waves in the visible, ultra-violet, infra-red, microwave, radio, X ... o large that no region is distinct, several overlap each other. Each of these regions in the electromagnetic spectrum represent transverse waves, travelling as electrical and magnetic fields which int ...

(11 pages) 97 1 2.3 Dec/2003

Subjects: Science Essays > Physics

Technological Innovation/ Development Prior to 1500AD:

The compass is an instrument containing a freely suspended magnetic element which displays the direction of the horizontal component of the Earth's magnetic fi ... irection of the horizontal component of the Earth's magnetic field at the point of observation. The magnetic compass is an old Chinese invention. Chinese fortune tellers used lodestones to construct t ... ortune telling boards. Magnetite was nicknamed lodestone and used by early navigators to locate the magnetic North Pole.Eventually someone noticed that the lodestones were better at pointing out real ...

(2 pages) 42 0 3.7 Feb/2004

Subjects: Science Essays > Technology

Motors and Generators.

harges*Oersted had showed in the 19th century that a current carrying conductor was surrounded by a magnetic field*Moving charges experience a force in a magnetic fieldFactors that effect the magnitud ... ts - example pf motion of charged particles in a field*Charged particles trapped inside the earth's magnetic field, which oscillate back and forth between the poles*These charged particles experience ...

(8 pages) 47 2 3.0 Mar/2004

Subjects: Science Essays > Physics

Ideas to Implementation.

arged particles from cathode to anode*Structures built around the cathode (e.g. electric plates and magnetic coils) can be used to manipulate CRCharge particles produce an electric field*Electric fiel ... sitive to negative*For oppositely charged plates - E = V/dForce acting on a charge moving through a magnetic field*Charges moving through a magnetic field produces a force*F = qvbSin+*Force greatest w ...

(10 pages) 90 0 2.3 Mar/2004

Subjects: Science Essays > Physics

How a MRI works and how a compass works

How a Magnetic Imaging Resonator WorksIf you have ever seen an MRI machine, you know that the basic design ... wever, the basic design is the same. Once the body part to be scanned is in the exact center of the magnetic field, the scan can begin.In conjunction with radio pulses of energy, the MRI scanner can p ... mportant part of medical studies.How does a compass work?A compass is an extremely simple device. A magnetic compass consists of a small, lightweight magnet balanced on a nearly frictionless pivot poi ...

(3 pages) 46 0 5.0 May/2004

Subjects: Science Essays

Superparamagnetic's Limit

Seagate's Hamr (Heat Assisted Magnetic Recording) technology doubles the hard disc densities of hard disks. According to the Winkl ... the hard disc densities of hard disks. According to the Winkle article, "One of the key barriers in magnetic storage is the "superparamagnetic limit," a point in which bits are crammed together so tig ... d the data can be written to or the bit 'flipped'-much more easily by the head using an appropriate magnetic field "(CPU, 107) and the existing data will not be harmed because the laser heat source is ...

(2 pages) 24 0 5.0 Jun/2004

Subjects: Science Essays > Technology

The Raisins in a Bun Model done by JJ Thomson and the discoveries that followed.

e of aluminum until it turned red. Beta rays were described as being streams of particles bent in a magnetic field with a negative charge. These beta rays were proven to be minute in size and collecti ...

(2 pages) 27 0 4.1 Oct/2004

Subjects: Science Essays > Physics

The History Of The Atomic Theory and Michael Farrady

ctricity. From these observations, Faraday came to conclusion that electricity created some sort of magnetic field. After much deliberation he decided that the converse must be true as well, that magn ... romagnet to be invented. It was not until the 29th of August 1831 when he discovered electro-magnetic induction. This was the principle behind the electric transformer and generator. He created ...

(2 pages) 38 0 4.2 Oct/2004

Subjects: Science Essays > Physics

Electromagnetic Induction

The phenomenon called electromagnetic induction was first noticed and investigated by Michael Faraday, in 1831. Electromagnetic i ... nduction is the production of an electromotive force (emf) in a conductor as a result of a changing magnetic field about the conductor and is a very important concept. Faraday discovered that, wheneve ... e 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 magnet near the wire could not prod ...

(9 pages) 45 0 4.3 Nov/2004

Subjects: Science Essays > Physics

One application of magnetic fields in household appliances.

One thing that uses magnetic fields is the electric motor, which is used in many household appliances, such as electric ... small appliances. In this instance the electric motor has an electric current, giving it also this magnetic field.An electric motor converts electricity into mechanical motion.Most electric motors wo ... overarching concept is that a force is generated when a current-carrying element is subjected to a magnetic field. In a cylindrical motor, the rotor rotates because a torque is developed when this fo ...

(14 pages) 48 0 0.0 Sep/2005

Subjects: Science Essays > Physics

Nikola Teala: The Electrical Genius.

d poetry. He was self-disciplined and compulsive. His principle contribution to the field of electromagnetic engineering is the discovery of the rotating magnetic field and the development of the poly ... . Historians credit Tesla with being a genius because he not only made unique discoveries in electromagnetic engineering but developed these discoveries into working systems in an area of science that ...

(5 pages) 48 0 5.0 Dec/2005

Subjects: History Term Papers > European History