MAKING MAGNETS WORK – MAKE A COMPASS AND AN
... Electricity produces movement if coils of wire carrying current are placed near a magnet. When like poles of the magnet and the current-carrying coils of wire (which act like a magnet) face each other, they repel each other and cause movement. This is the basis of an electric motor. ...
... Electricity produces movement if coils of wire carrying current are placed near a magnet. When like poles of the magnet and the current-carrying coils of wire (which act like a magnet) face each other, they repel each other and cause movement. This is the basis of an electric motor. ...
MAGNETIC FORCE ON A CURRENT
... U-shaped wire suspended from balance DC power supply for wire Gaussmeter with transverse probe INTRODUCTION: The apparatus for this experiment is set up as shown in Figure 1. A U-shaped wire forms part of a balance and is also connected to a DC power supply so that a variable current may be passed t ...
... U-shaped wire suspended from balance DC power supply for wire Gaussmeter with transverse probe INTRODUCTION: The apparatus for this experiment is set up as shown in Figure 1. A U-shaped wire forms part of a balance and is also connected to a DC power supply so that a variable current may be passed t ...
Lecture 23 Chapter 31 Induction and Inductance
... • Have 2 conducting loops near each other – Close switch so current flows in one loop, briefly register a current in other loop – Open switch, again briefly register current in other loop but in opposite direction ...
... • Have 2 conducting loops near each other – Close switch so current flows in one loop, briefly register a current in other loop – Open switch, again briefly register current in other loop but in opposite direction ...
October 16/17th Induction and Inductance
... Force on a wire carrying current, i1, due to B of another parallel wire with current i2 ...
... Force on a wire carrying current, i1, due to B of another parallel wire with current i2 ...
Ch01
... characterised by the fact that the voltages induced by time–varying magnetic fields (fluxes) are negligible with respect to any static or steady–state voltage developed in the same region. Equivalently, this state can be characterised by the fact that the magnetic energy density is negligible with r ...
... characterised by the fact that the voltages induced by time–varying magnetic fields (fluxes) are negligible with respect to any static or steady–state voltage developed in the same region. Equivalently, this state can be characterised by the fact that the magnetic energy density is negligible with r ...
Lecture Notes
... The physical quantity we call electric charge is a property of matter. The particles of which all material objects are made have inertia (mass) and electric charge, among other properties. In contrast to mass, however, electric charge occurs in two kinds, which are called positive (+) and negative ( ...
... The physical quantity we call electric charge is a property of matter. The particles of which all material objects are made have inertia (mass) and electric charge, among other properties. In contrast to mass, however, electric charge occurs in two kinds, which are called positive (+) and negative ( ...
File
... two parallel plates - effectively the same as adding the electric field of both plates in isolation. The field on the right is really a combination of the rigtwardly headed field lines of the left plate and the right plate, and the field on the left is really a combination of the leftwardly headed f ...
... two parallel plates - effectively the same as adding the electric field of both plates in isolation. The field on the right is really a combination of the rigtwardly headed field lines of the left plate and the right plate, and the field on the left is really a combination of the leftwardly headed f ...
Calculated E-I characteristics of HTS pancakes and coils exposed to
... critical current and averaged E-I curve of the HTS coil are insufficient parameteres of its design. Furthermore, knowing the distributions of current density and electric field in the coil is a necessity for a detailed design of the coil, particularly in the case of cryogen free magnets. Different s ...
... critical current and averaged E-I curve of the HTS coil are insufficient parameteres of its design. Furthermore, knowing the distributions of current density and electric field in the coil is a necessity for a detailed design of the coil, particularly in the case of cryogen free magnets. Different s ...
Magnetic field
A magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H, where H is measured in units of amperes per meter (symbol: A·m−1 or A/m) in the SI. B is measured in teslas (symbol:T) and newtons per meter per ampere (symbol: N·m−1·A−1 or N/(m·A)) in the SI. B is most commonly defined in terms of the Lorentz force it exerts on moving electric charges.Magnetic fields can be produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin. In special relativity, electric and magnetic fields are two interrelated aspects of a single object, called the electromagnetic tensor; the split of this tensor into electric and magnetic fields depends on the relative velocity of the observer and charge. In quantum physics, the electromagnetic field is quantized and electromagnetic interactions result from the exchange of photons.In everyday life, magnetic fields are most often encountered as a force created by permanent magnets, which pull on ferromagnetic materials such as iron, cobalt, or nickel, and attract or repel other magnets. Magnetic fields are widely used throughout modern technology, particularly in electrical engineering and electromechanics. The Earth produces its own magnetic field, which is important in navigation, and it shields the Earth's atmosphere from solar wind. Rotating magnetic fields are used in both electric motors and generators. Magnetic forces give information about the charge carriers in a material through the Hall effect. The interaction of magnetic fields in electric devices such as transformers is studied in the discipline of magnetic circuits.