Xem 1-20 trên 39 kết quả Magnetic forces
  • Tiểu luận Vật lý: Kính hiển vi lực từ (magnetic force microscopy - MFM) sau đây bao gồm những nội dung về tổng quan từ và vật liệu từ, kính hiển vi MFM và ứng dụng của nó trong phân tích vật liệu từ (lịch sử, cấu tạo, nguyên lý hoạt động,...).

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  • This chapter presents the following content: Force on a moving charge, force on a differential current element, force between differential current elements, force and torque on a closed circuit, magnetization and permeability, magnetic boundary conditions, the magnetic circuit, potential energy of magnetic fields, inductance and mutual inductance.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Hysteresis loops of individual Co nanostripes measured by magnetic force microscopy

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  • Tham khảo tài liệu 'chapter 9: magnetic forces, materials, and inductance', khoa học tự nhiên, vật lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Assessment of Influence of Magnetic Forces on Aggregation of Zero-valent Iron Nanoparticles

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  • This chapter presents the following content: Forces and torques in magnetic field systems, energy balance, energy in singly – excited magnetic field systems, determination of magnetic force and torque from energy and coenergy, multiply – excited magnetic field systems, forces and torques in systems with permanent magnets, dynamic equations, analytical techniques.

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  •  Some history:  Magnetic effects from natural magnets have been known for a long time. Recorded observations from the Greeks more than 2500 years ago.  The word magnetism comes from the Greek word for a certain type of stone (lodestone) containing iron oxide found in Magnesia, a district in northern Greece.  Properties of lodestones: could exert forces on similar stones and could impart this property (magnetize) to a piece of iron it touched.

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  • NMR is an experiment in which the resonance frequencies of nuclear magnetic systems are investigated. NMR always employs some form of magnetic field (usually a strong externally applied field B0) NMR is a form of both absorption and emission spectroscopy, in which resonant radiation is absorbed by an ensemble of nuclei in a sample, a process causing detectable emissions via a magnetically induced electromotive force.

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  • Magnetism often has a slight overtone of being mysterious. This is probably caused by the surprisingly strong forces between magnets which everybody can experience with magnetic toys, magnet boards, or similar objects. A strange effect is the unique ability of magnetic fields to penetrate many substances without any attenuation. Though the physical basis of magnetism is well explored, the outsider usually does not know very much about the details and sometimes tends to overestimate the real possibilities provided by magnetism.

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  • Mời các bạn cùng tham khảo nội dung cuốn sách "Magnet Funattract" dưới đây để nắm bắt được cách viết, cách phát âm các từ vựng: Force, friction, gravity, motion, repel, simple machine, work. Với các bạn bước đầu học tiếng Anh thì đây là tài liệu tham khảo hữu ích.

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  • Attract, force, gravity, magnet, pole, repel, speed, vibrate là những từ vựng được tác giả Carol Levine giới thiệu đến trong cuốn sách "Forces and Sounds". Mời quý phụ huynh và các bạn cùng tham khảo để có thêm tài liệu phục vụ nhu cầu dạy tiếng Anh cho trẻ.

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  • This paper introduces a new analytical method for performing the output torque calculations of an interior permanent magnet synchronous motor (IPMSM) including both permanent magnet and reluctance torque components.

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  • Chapter 7 Forces at work includes about tools and machines (How can a push help you lift something? What makes work easier? What is a tool?), gravity (Does one fall faster?Does one fall faster? What is gravity? What is weight?), magnets push, magnets pull; sound.

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  • Electric motors convert electrical energy into mechanical energy by utilizing the properties of electromagnetic energy conversion. The different types of motors operate in different ways and have different methods of calculating the performance, but all utilize some arrangement of magnetic fields. Understanding the concepts of electromagnetics and the systems of units that are employed is essential to understanding electric motor operation.The first part of this chapter covers the concepts and units and shows how forces are developed.

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  • Magnets are pieces of metal that have the ability to attract other metals. Every magnet has two poles: a north and a south. Much like electrical charges, two similar magnetic poles repel each other; while opposite magnetic poles attract each other. Magnets have a continuous force around them that is known as a magnetic field. This field enables them to attract other metals. Figure 1 illustrates this force using bar and horseshoe magnets.

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  • This textbook has evolved from part of the first-year graduate curriculum in the Department of Materials Science and Engineering at the Massachusetts Institute of Technology (MIT) . This curriculum includes four required semester-long subjects- “Materials at Equilibrium,” “Mechanical Properties of Materials,” “Electrical, Optical, and Magnetic Properties of Materials,” and “Kinetic Processes in Materials.

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  • Of the many ages of man—the Stone Age, the Bronze Age, the Iron Age, etc.-that preceded the 1800s, and that led one into the other, none was as rewarding to mankind as the electrical age. We now stand in awe of the space age, andin fear we face the nuclear age. From electricity, however, has been drawn a n ever growing abundance o f light, power, warmth, intelligence, and medical aid-all beneficent, silent, and ready. Electricity is the one force in the arsenal of man that found no precedent in earlier history, nor was it drawn from classical times.

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  • Since the advent of magnetic resonance (MR) imaging, systems with amagnetic field intensity of 1.5 tesla (T) have been deemed the gold standard for different clinical applications in all body areas. Ongoing advances in hardware and software have made theseMRsystems increasingly compact, powerful and versatile, leading to the development of higher magnetic field strength MRsystems (3.0 T) for use in clinical practice and for research purposes. As usually occurs with a new technology, 3.0 T MR imaging units will probably follow the same development trends in the years to come....

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  • This book evolved from the first term of a two-term course on the physics of charged particle acceleration that I taught at the University of New Mexico and at Los Alamos National Laboratory. The first term covered conventional accelerators in the single particle limit. The second term covered collective effects in charged particle beams, including high current transport and instabilities. The material was selected to make the course accessible to graduate students in physics and electrical engineering with no previous background in accelerator theory.

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  • Medical imaging has been transformed over the past 30 years by the advent of computerized tomography (CT), magnetic resonance imaging (MRI), and various advances in x-ray and ultrasonic techniques. An enabling force behind this progress has been the (so far) exponentially increasing power of computers, which has made it practical to explore fundamentally new approaches.

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