"A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials."
Introduction to magnetic fields and their properties, Biot-Savart law, calculation of magnetic fields due to current carrying wires and loops, magnetic forces on current-carrying wires.
Magnetic Field: It is the invisible force field created by the movement of electric charges.
Magnetic Flux: It is a measure of the strength of a magnetic field passing perpendicularly through a surface.
Magnetic Dipole: It is a pair of equal and opposite poles that create a magnetic field.
Magnetic Moment: It is the strength of the magnetic field created due to the magnetic dipole.
Magnetic Induction: It is the process by which a body acquires a magnetic field due to the presence of an external magnetic field.
Lorentz Force: It is the force experienced by a charged particle in a magnetic field.
Ampere's Law: It relates the magnetic field to the current flowing through a conductor.
Biot-Savart Law: It describes the magnetic field generated by a steady current.
Faraday's Law: It describes the electromagnetic induction, i.e. the production of an electromotive force in a circuit due to a changing magnetic field.
Lenz's Law: It describes the direction of the induced electromotive force in a circuit due to a changing magnetic field.
Magnetic Hysteresis: It is the tendency of a ferromagnetic material to maintain a residual magnetic field when an external magnetic field is removed.
Magnetic Resonance Imaging: It is a medical imaging technique that uses strong magnetic fields to produce images of the body.
Gauss's Law for Magnetism: It relates the magnetic field to the sources of the magnetic field.
Magnetic Materials: These are materials that can create a magnetic field.
Magnetic Domains: These are regions in magnetic materials where the atomic magnetic moments are aligned in the same direction.
Magnetic Properties: These are the properties of magnetic materials, such as their strength of magnetization and coercive force.
Magnetic Circuits: These are circuits that contain magnetic elements, such as transformers and inductors.
Electromagnets: These are magnets created by electric current.
Magnetic Levitation: It is the phenomenon of levitation of an object due to the repulsive force between magnets.
Magnetic Fields of Celestial Bodies: It is the study of magnetic fields of planets and stars.
Static Magnetic Field: This type of magnetic field has a constant strength and direction. It occurs when there is a stationary magnet or a current-carrying wire.
Time-Varying Magnetic Field: This magnetic field changes strength and direction with time. It is produced by a changing electric field, which can be created by a time-varying current or a moving magnet.
Uniform Magnetic Field: This type of magnetic field has a constant strength and direction, and its lines of force are parallel and evenly spaced. It can be produced by a pair of parallel current-carrying wires or a cylindrical magnet.
Non-Uniform Magnetic Field: This type of magnetic field has a varying strength and direction, and its lines of force are not parallel or evenly spaced. It can be produced by a curved magnet or a current-carrying coil.
Magnetic Field of a Dipole: This magnetic field is produced by a small magnetic dipole, which consists of two opposite magnetic poles separated by a small distance. This field is used to describe the behavior of magnets.
Electromagnetic Force: This force is exerted between two charged particles that are moving relative to each other. It is one of the four fundamental forces of nature, and it is responsible for the interaction of charged particles in atoms and molecules.
Lorentz Force: This force is exerted on a charged particle that is moving in a magnetic field. It is named after the Dutch physicist Hendrik Lorentz, who first described the force.
Magnetic Torque: This torque is exerted on an object that is placed in a magnetic field and has a magnetic moment. The torque causes the object to rotate, and it is used in various devices such as electric motors and generators.
Magnetic Induction: This is the process of inducing a magnetic field in a material by placing it in a magnetic field. The induced field is proportional to the strength of the applied field and the magnetic susceptibility of the material.
Magnetic Flux: This is the measure of the amount of magnetic field passing through a surface. It is given by the product of the magnetic field strength and the surface area perpendicular to the direction of the field.
Magnetic Hysteresis: This is the phenomenon where a magnetic material retains some magnetization even after the external magnetic field is removed. It is due to the alignment of magnetic domains within the material.
Magnetic Resonance: This is a phenomenon where a magnetic field causes alignment and movement of atomic and subatomic particles. It is used in medical imaging technologies such as Magnetic Resonance Imaging (MRI).
Magnetostatics: This is the branch of electromagnetism that deals with the study of electromagnetic phenomena in the absence of time-varying electric fields. It includes the study of magnetic fields and their interactions with other objects.
"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."