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questions with answers on electromagnetism
... The strength of the magnetic field is proportional to the current in the wire. If you double the current, the magnetic force is doubled. Since Voltage = Current x Resistance (V = I*R), you can double the current in a wire by doubling the voltage of the source of electricity. Turns of coil If you wra ...
... The strength of the magnetic field is proportional to the current in the wire. If you double the current, the magnetic force is doubled. Since Voltage = Current x Resistance (V = I*R), you can double the current in a wire by doubling the voltage of the source of electricity. Turns of coil If you wra ...
Discussion 10
... Magnets & transformers A magnet is a material or object that produces a magnetic field. A method to detect a magnetic field is to scatter iron filings and observe their pattern. An electromagnet is a wire coil in which the magnetic Iron filings that have oriented field is produced by the flow of an ...
... Magnets & transformers A magnet is a material or object that produces a magnetic field. A method to detect a magnetic field is to scatter iron filings and observe their pattern. An electromagnet is a wire coil in which the magnetic Iron filings that have oriented field is produced by the flow of an ...
Types of Magnetism and Magnetic Domains
... causes it to create a magnetic field in opposition to an externally applied field. • It is not the result of unpaired electrons, but is found in all materials. • The electrons in a diamagnetic material rearrange their orbits slightly to create small persistent currents that oppose or repel the exter ...
... causes it to create a magnetic field in opposition to an externally applied field. • It is not the result of unpaired electrons, but is found in all materials. • The electrons in a diamagnetic material rearrange their orbits slightly to create small persistent currents that oppose or repel the exter ...
Magnets and Magnetic Field
... Earth’s Magnetic Field • The Earth produces a magnetic field that resembles a giant bar magnet • Because the “north seeking” pole of a magnet (the north pole of the magnet) points towards the north geographic pole, that is actually the south magnetic pole of the Earth ...
... Earth’s Magnetic Field • The Earth produces a magnetic field that resembles a giant bar magnet • Because the “north seeking” pole of a magnet (the north pole of the magnet) points towards the north geographic pole, that is actually the south magnetic pole of the Earth ...
2.5. Types of Materials
... The ferrous metals are magnetic because they contain iron, but they may have small amounts of other metals/elements for the required properties. They produce a strong magnetic field because a large part of the individual atomic magnetic moments line up. This can be done by an external magnetic field ...
... The ferrous metals are magnetic because they contain iron, but they may have small amounts of other metals/elements for the required properties. They produce a strong magnetic field because a large part of the individual atomic magnetic moments line up. This can be done by an external magnetic field ...
PHYSICS 571 – Master`s of Science Teaching “Electromagnetism
... activation of traffic lights by a car moving over underground coils of wire triggering security system at the airport by altering magnetic field in the coils as one walks through scanning magnetic strips on back of credit cards recording of sound on tape electronic devices in computer hard drives, ...
... activation of traffic lights by a car moving over underground coils of wire triggering security system at the airport by altering magnetic field in the coils as one walks through scanning magnetic strips on back of credit cards recording of sound on tape electronic devices in computer hard drives, ...
B v Q l - Rowan County Schools
... Quantifying Magnetism A charge traveling through a magnetic field experiences a force… ...
... Quantifying Magnetism A charge traveling through a magnetic field experiences a force… ...
Magnetic anomalies in East Antarctica: application to definition of
... that reflect such factors as their ages and lithologies, the degree of reworking, deformations and metamorphic variations. In the shield areas of East Antarctica, the aeromagnetic data provide a unique window on basement geology and structural architecture and allow for better defining the boundarie ...
... that reflect such factors as their ages and lithologies, the degree of reworking, deformations and metamorphic variations. In the shield areas of East Antarctica, the aeromagnetic data provide a unique window on basement geology and structural architecture and allow for better defining the boundarie ...
Document
... be discovered was lodestone, which is better known now as magnetite (Fe3O4). Magnetite is found in many parts of the world and is an important iron ore used for steel making. The word magnet comes from the Greek word magnes, which itself may derive from the ancient colony of Magnesia (in Turkey). Co ...
... be discovered was lodestone, which is better known now as magnetite (Fe3O4). Magnetite is found in many parts of the world and is an important iron ore used for steel making. The word magnet comes from the Greek word magnes, which itself may derive from the ancient colony of Magnesia (in Turkey). Co ...
Magnetic stripe card
A magnetic stripe card is a type of card capable of storing data by modifying the magnetism of tiny iron-based magnetic particles on a band of magnetic material on the card. The magnetic stripe, sometimes called swipe card or magstripe, is read by swiping past a magnetic reading head. Magnetic stripe cards are commonly used in credit cards, identity cards, and transportation tickets. They may also contain an RFID tag, a transponder device and/or a microchip mostly used for business premises access control or electronic payment.Magnetic recording on steel tape and wire was invented during World War II for recording audio. In the 1950s, magnetic recording of digital computer data on plastic tape coated with iron oxide was invented. In 1960 IBM used the magnetic tape idea to develop a reliable way of securing magnetic stripes to plastic cards, under a contract with the US government for a security system. A number of International Organization for Standardization standards, ISO/IEC 7810, ISO/IEC 7811, ISO/IEC 7812, ISO/IEC 7813, ISO 8583, and ISO/IEC 4909, now define the physical properties of the card, including size, flexibility, location of the magstripe, magnetic characteristics, and data formats. They also provide the standards for financial cards, including the allocation of card number ranges to different card issuing institutions.