- "Michael Faraday is generally credited with the discovery of induction in 1831..."
Faraday's law of electromagnetic induction, Lenz's law, induced EMF, magnetic flux, transformer, AC generators, eddy currents.
Magnetic field: The region around a magnet where it exerts a force on magnetic objects.
Magnetic forces: The forces that arise between two magnets or between a magnet and a magnetic object.
Magnetic materials: The properties of materials that make them magnetic, such as iron, cobalt, and nickel.
Magnetic fields around conductors: The field lines that arise around wires carrying electric currents.
Electromagnetic induction: The creation of a current in a wire when the wire is moved across a magnetic field.
Induced EMF: The electromotive force produced in a conductor when there is a change in its magnetic field.
Faraday's Law: The relationship between the induced EMF, the rate of change of the magnetic field, and the number of turns in the coil.
Lenz's Law: The polarity of the induced EMF is such that it opposes the change in the magnetic field that caused it.
Transformers: Devices that transfer energy from one circuit to another through electromagnetic induction.
Eddy currents: The currents that arise in a conductor when it is exposed to a changing magnetic field.
AC generators: Devices that convert mechanical energy into electrical energy by rotating a coil of wire in a magnetic field.
AC motors: Devices that convert electrical energy into mechanical energy by rotating a magnetic field around a stationary coil of wire.
Maxwell's equations: A set of equations that explain the relationship between electric and magnetic fields and their interaction with matter.
Electromagnetic waves: The waves that are produced when a changing electric field creates a changing magnetic field and vice versa.
Electromagnetic spectrum: The range of frequencies of electromagnetic waves, from radio waves to gamma rays.
Applications of electromagnetism: The various applications of electromagnetic technology, such as in motors, generators, transformers, and telecommunications.
Faraday's Law of Induction: This is a fundamental law that explains how an electric current is induced in a conductor when it is placed in a changing magnetic field. The law states that the magnitude of the induced current is proportional to the rate of change of the magnetic field.
Lenz's Law: This law states that the direction of the induced current is such that it opposes the change in the magnetic field that produced it. This is a consequence of the conservation of energy and the law of electromagnetic induction.
Self-induction: This occurs when a changing current in a coil induces an opposing voltage in the same coil. This happens because the changing current generates a changing magnetic field, which induces an opposing voltage in the coil, as described by Lenz's law.
Mutual Induction: This occurs when a changing magnetic field in one coil induces a voltage in an adjacent coil. The voltage induced in the second coil is proportional to the rate of change of the magnetic field in the first coil, as described by Faraday's law.
Eddy currents: These are induced currents that flow within a conductor in response to a changing magnetic field. Eddy currents are undesirable in many applications, as they can generate excess heat and cause energy loss.
Skin effect: This is the tendency of alternating current to concentrate near the surface of a conductor, rather than flowing uniformly throughout the conductor. This effect is due to the interaction of the changing magnetic field with the moving electrons in the conductor.
Hysteresis: This is the tendency of a magnetic field to retain some of its magnetization even after the external magnetic field has been removed. This effect is due to the alignment of the magnetic domains within a material.
Magnetic saturation: This occurs when a magnetic field applied to a material reaches a certain strength, beyond which the material can no longer be magnetized further. This limit is determined by the magnetic properties of the material.
Magnetic levitation: This is a phenomenon in which an object is suspended in the air by a magnetic field. This can be accomplished using a combination of magnetic induction and the principle of magnetic repulsion.
Magnetic resonance imaging (MRI): This is a medical imaging technique that uses magnetic fields and radio waves to create detailed images of the body's internal structures. The technique relies on the principles of magnetic induction to generate a strong magnetic field and detect the resulting signals from the body's tissues.
- "James Clerk Maxwell mathematically described it as Faraday's law of induction."
- "Lenz's law describes the direction of the induced field."
- "Faraday's law was later generalized to become the Maxwell–Faraday equation..."
- "Electromagnetic induction has found many applications, including electrical components such as inductors and transformers, and devices such as electric motors and generators."
- "Michael Faraday is generally credited with the discovery of induction in 1831..."
- "Faraday's law was later generalized to become the Maxwell–Faraday equation..."
- "James Clerk Maxwell mathematically described it as Faraday's law of induction."
- "Lenz's law describes the direction of the induced field."
- "Electromagnetic induction has found many applications, including electrical components such as inductors and transformers..."
- "Faraday's law was later generalized to become the Maxwell–Faraday equation..."
- "Lenz's law describes the direction of the induced field."
- "Electromagnetic induction has found many applications, including... devices such as electric motors and generators."
- "Michael Faraday is generally credited with the discovery of induction in 1831..."
- "Faraday's law was later generalized to become the Maxwell–Faraday equation, one of the four Maxwell equations in his theory of electromagnetism."
- "James Clerk Maxwell mathematically described it as Faraday's law of induction."
- "Lenz's law describes the direction of the induced field."
- "Electromagnetic induction has found many applications, including... devices such as electric motors and generators."
- "Faraday's law was later generalized to become the Maxwell–Faraday equation..."
- "Electromagnetic induction has found many applications, including electrical components such as inductors and transformers, and devices such as electric motors and generators."