INDUCTANCES Meaning and
Definition
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Inductances are fundamental electrical properties that describe the ability of a circuit component to store energy in the form of a magnetic field when subjected to a varying electric current. More specifically, inductance refers to the ratio of the voltage change across a component to the rate of change of current flowing through it. It is denoted by the symbol L and measured in henries (H).
Inductances exist due to the phenomenon of electromagnetic induction, which occurs when the magnetic field produced by an electric current induces an electromotive force (EMF) in a nearby conductor. Essentially, inductance represents the opposition of a component to changes in current flow. It resists the buildup or collapse of the magnetic field created by the current, and as a result, stores energy that can be subsequently released.
Inductances are encountered in various electrical and electronic devices, such as inductors and transformers, which utilize coils of wire to induce inductance. They play a crucial role in numerous applications, including filters, energy storage, and circuit protection. Additionally, inductances impact the behavior of electrical systems, affecting characteristics such as impedance, reactance, and resonance.
Understanding and manipulating inductances is particularly valuable in electrical engineering, as it allows for the design and optimization of circuits and systems. By accurately measuring and controlling the inductances of different components, engineers can tailor the performance of devices, enhance efficiency, and mitigate unwanted effects such as disturbances and voltage surges.
Etymology of INDUCTANCES
The word "inductances" has its origin in the field of physics, specifically in the study of electrical circuits and electromagnetic phenomena. It is derived from the noun "inductance", which refers to the property of an electrical circuit whereby a change in current flowing through it induces an electromotive force (EMF) or voltage.
The term "inductance" was coined by Oliver Heaviside, a British electrical engineer and physicist, in the late 19th century. He introduced it as a concept to describe the behavior of electric circuits in relation to electromagnetic fields. Heaviside based the term on the verb "induce", which means to bring about, generate or produce.
The suffix "-ance" added to "induct" signifies the quality, state, or condition of being induced.
