Tài liệu PDF
... ferromagnetic material. The information stored here is digital (a region is either magnetic or not); in other applications, it can be analog (with a varying strength), such as on audiotapes. ...
... ferromagnetic material. The information stored here is digital (a region is either magnetic or not); in other applications, it can be analog (with a varying strength), such as on audiotapes. ...
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... Other scientists including André-Marie Ampère followed up on Oersted’s findings, providing further research into the creation of magnetic fields using electrical currents. To learn more about Oersted’s demonstration and electromagnetism, go to http://www-spof.gsfc.nasa.gov/Education/whmfield.html. W ...
... Other scientists including André-Marie Ampère followed up on Oersted’s findings, providing further research into the creation of magnetic fields using electrical currents. To learn more about Oersted’s demonstration and electromagnetism, go to http://www-spof.gsfc.nasa.gov/Education/whmfield.html. W ...
Faraday`s Law
... to keep the magnetic flux in the loop constant. In the examples below, if the B field is increasing, the induced field acts in opposition to it. If it is decreasing, the induced field acts in the direction of the applied field to try to keep it constant. ...
... to keep the magnetic flux in the loop constant. In the examples below, if the B field is increasing, the induced field acts in opposition to it. If it is decreasing, the induced field acts in the direction of the applied field to try to keep it constant. ...
Electricity and Magnetism
... which electric charges cannot travel easily. A conductor is a material, such as metal wire, through which electric charges can travel easily. ...
... which electric charges cannot travel easily. A conductor is a material, such as metal wire, through which electric charges can travel easily. ...
going deeper - Squarespace
... interacted, the force between them acted along a line joining them. In the next diagrams you see what I’m trying to say about forces acting along the same line between the bodies. Figure 1 The force of the bucket on the hand acts on the same line as the force of the hand on the ...
... interacted, the force between them acted along a line joining them. In the next diagrams you see what I’m trying to say about forces acting along the same line between the bodies. Figure 1 The force of the bucket on the hand acts on the same line as the force of the hand on the ...
Electricity and Magnetism
... Magnetite is a mineral that is naturally magnetic. Human-Made Magnets Some materials can be magnetized when placed near a strong magnetic field. Soft magnetic materials (Iron) Hard magnetic materials (Cobalt, Nickel) Electromagnets Magnets can be made by passing a current through a coil of wire. ...
... Magnetite is a mineral that is naturally magnetic. Human-Made Magnets Some materials can be magnetized when placed near a strong magnetic field. Soft magnetic materials (Iron) Hard magnetic materials (Cobalt, Nickel) Electromagnets Magnets can be made by passing a current through a coil of wire. ...
Electricity and Magnetism
... destroyed. An object becomes electrified because the electric charge is transferred from one object to another. One object gains some negative charge. The other object gains the same amount of positive charge. ...
... destroyed. An object becomes electrified because the electric charge is transferred from one object to another. One object gains some negative charge. The other object gains the same amount of positive charge. ...
Electromagnetism - KCPE-KCSE
... This is shown by the field lines being closest together near to the wire. The strength of the field increases if the electric current is increased. ...
... This is shown by the field lines being closest together near to the wire. The strength of the field increases if the electric current is increased. ...
directed_reading_Magnetism and Electricity p518-52
... _____ 2. Which of the following actions will decrease the strength of the magnetic field of an electromagnet? a. using fewer loops of wire per meter in the coil b. decreasing the current in the wire c. removing the iron core d. All of the above 3. Describe what happens when you hold a compass close ...
... _____ 2. Which of the following actions will decrease the strength of the magnetic field of an electromagnet? a. using fewer loops of wire per meter in the coil b. decreasing the current in the wire c. removing the iron core d. All of the above 3. Describe what happens when you hold a compass close ...
trra230_234_script_20151002_final
... forces push the electromagnet, which spins on its axle, and an electric motor is born. The method applied in this demonstration uses Newton's first law of motion , which states that, "an object in motion remains in motion unless acted upon by an outside force". This means that when the electromagnet ...
... forces push the electromagnet, which spins on its axle, and an electric motor is born. The method applied in this demonstration uses Newton's first law of motion , which states that, "an object in motion remains in motion unless acted upon by an outside force". This means that when the electromagnet ...
Hall effect
The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879.The Hall coefficient is defined as the ratio of the induced electric field to the product of the current density and the applied magnetic field. It is a characteristic of the material from which the conductor is made, since its value depends on the type, number, and properties of the charge carriers that constitute the current.