"A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials."
A field created by a magnet or a moving electric charge that exerts a force on other magnets or moving charges placed in it.
Magnetic Fields: Study of the magnetic field is the foundation of electromagnetism. It includes the properties and behavior of magnetic fields that emanate from magnetic objects.
Magnetic Flux: It is the measure of the number of magnetic field lines passing through a given area. It is important to understand magnetic flux and how its value changes with the variation of external parameters.
Magnetic Forces: Magnetic forces are associated with magnetic fields and other electrically charged particles. They involve the action of a magnetic field on a moving charged particle.
Magnetic Materials: Study of magnetic material involves the behavior of magnetic elements like iron, nickel, and cobalt. It also helps in understanding the alignment of magnetic moments in the material.
Electromagnetic Waves: Electromagnetic waves are a type of waves that travel through space and propagate through the electromagnetic field. Understanding electromagnetic waves is an essential aspect of electromagnetism.
Electromagnetic Induction: Electromagnetic induction is the process of generating an electromotive force by a changing magnetic field. It plays an important role in the generation of electricity.
Faraday’s Law: This law states that the magnitude of the induced e.m.f. in a closed circuit is proportional to the rate of change of magnetic flux through the circuit.
Ampere’s Law: It is the mathematical relationship between the electric current and the magnetic field created by that current. The law helps in understanding the magnetic field created by a current-carrying conductor.
Maxwell’s Equations: Maxwell’s equations describe how the electromagnetic fields behave as a result of charges and currents in the particles. It is a set of differential equations that determine electromagnetism.
Lorentz Force: Lorentz force describes the force that is exerted on a charged particle by a magnetic field in which it is moving. This force is perpendicular to both the magnetic field and the direction of motion of the particle.
Magnetic Resonance Imaging (MRI): MRI is a medical imaging technique that uses strong magnetic fields to create images of the body. It is an application of electromagnetism.
Magnetic Levitation: Magnetic levitation is the use of magnetic fields to suspend objects in air. It is an application of electromagnetism.
Magnetic Storage: Magnetic storage involves the use of magnetic fields to store data. It is an essential technology used in hard disk drives.
Magnetic Particle Inspection: This is a non-destructive testing technique that uses magnetic fields to identify defects on the surface of metallic materials.
Magnetic Monopoles: A magnet with only one magnetic pole is known as a magnetic monopole. Despite the theoretical possibility, a magnetic monopole has never been observed in nature.
Static Magnetic Field: A stationary magnetic field that does not change with time.
Time-varying Magnetic Field: A magnetic field that varies with respect to time. It can be sinusoidal or non-sinusoidal.
Alternating Magnetic Field: A time-varying magnetic field that oscillates between two values with a constant frequency.
Pulsed Magnetic Field: A magnetic field that is turned on and off at regular intervals.
Gradient Magnetic Field: A magnetic field that varies in strength and direction over space.
Rotating Magnetic Field: A magnetic field that rotates around an axis.
Residual Magnetic Field: A magnetic field that remains after the removal of an external magnetic field.
Induced Magnetic Field: A magnetic field that is created in a material due to the presence of an external magnetic field.
Demagnetizing Field: A magnetic field that reduces the magnetic moment of a material to zero.
Shielding Magnetic Field: A magnetic field that is used to protect a material or device from external magnetic fields.
Self-Magnetic Field: A magnetic field that is created by a current-carrying conductor.
Mutual Magnetic Field: A magnetic field that is created by the interaction of two or more magnetic fields.
Dipole Magnetic Field: A magnetic field created by a pair of equal and opposite magnetic poles.
Quadrupole Magnetic Field: A magnetic field created by two pairs of equal and opposite magnetic poles arranged in a square pattern.
Solenoidal Magnetic Field: A magnetic field created by a coil of wire carrying a current.
Toroidal Magnetic Field: A magnetic field created by a current-carrying coil wrapped into a donut shape.
Coulomb Magnetic Field: A magnetic field created by stationary electric charges.
Faraday Magnetic Field: A magnetic field created by a changing magnetic field.
Ampere Magnetic Field: A magnetic field created by a current-carrying wire.
Lorentz Magnetic Field: A magnetic field created by a moving charged particle.
"A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field."
"A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron and attracts or repels other magnets."
"A nonuniform magnetic field exerts minuscule forces on 'nonmagnetic' materials by three other magnetic effects: paramagnetism, diamagnetism, and antiferromagnetism."
"These forces are usually so small they can only be detected by laboratory equipment."
"The three magnetic effects on nonmagnetic materials are paramagnetism, diamagnetism, and antiferromagnetism."
"Magnetic fields surround magnetized materials, electric currents, and electric fields varying in time."
"It is described mathematically by a function assigning a vector to each point of space, called a vector field."
"In electromagnetics, the term 'magnetic field' is used for two distinct but closely related vector fields denoted by the symbols B and H."
"The unit of B, magnetic flux density, is the tesla."
"The unit of H, magnetic field strength, is ampere per meter (A/m)."
"In vacuum, the two fields are related through the vacuum permeability, B/μ0 = H."
"In a magnetized material, the quantities on each side of this equation differ by the magnetization field of the material."
"Magnetic fields are produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin."
"Magnetic fields and electric fields are both components of the electromagnetic force, one of the four fundamental forces of nature."
"Magnetic fields are used throughout modern technology, particularly in electrical engineering and electromechanics."
"Rotating magnetic fields are used in both electric motors and generators."
"The interaction of magnetic fields in electric devices such as transformers is conceptualized and investigated as magnetic circuits."
"Magnetic forces give information about the charge carriers in a material through the Hall effect."
"The Earth produces its own magnetic field, which shields the Earth's ozone layer from the solar wind and is important in navigation using a compass."