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capacitance, in electricity, capability of a body, system, circuit, or device for storing electric charge. Capacitance is expressed as the ratio of stored charge in coulombs to the impressed potential difference in volts. The resulting unit of capacitance is the farad [for Michael Faraday]. In an electric circuit the device designed to store charge is called a capacitor. An ideal capacitor, i.e., one having no resistance or inductance, may be spoken of as a capacitance. When an alternating current flows through a capacitor, the capacitor produces a reactance that resists the current (see impedance). While every element of a circuit has some capacitance, it is a goal of good design to reduce such unwanted or stray capacitance to a minimum.
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MaxineCapacitance is a measure of a component's ability to store electrical energy in an electric field formed between two conductive surfaces separated by an insulating material, known as a dielectric. It is determined by the size of the conductive surfaces, the distance between them, and the properties of the dielectric material. Capacitance is typically measured in farads (F) and is used to store and release electrical energy in electronic circuits.
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What happens to capacitance if voltage is increased?
If voltage is increased, capacitance remains constant. Capacitance is determined by the physical properties of the capacitor, such as plate area, distance between plates, and permittivity of the material, and is not affected by changes in voltage applied across the capacitor.
What happens to the capacitance fi the charge on the plates of a capacitor is doubled?
If the charge on the plates of a capacitor is doubled, the capacitance remains the same. Capacitance is determined by the physical dimensions and properties of the capacitor, such as the area of the plates, the distance between them, and the material between them.
What factors should I consider when determining how big of a capacitor I need for my project?
When determining the size of a capacitor for your project, consider factors such as the voltage requirements, capacitance value, size constraints, and the intended use of the capacitor. It is important to choose a capacitor that can handle the voltage and provide the necessary capacitance for your project while fitting within the physical space available.
What is the Kubo formula and how is it used to calculate the electrical conductivity of materials?
The Kubo formula is a mathematical equation used to calculate the electrical conductivity of materials. It takes into account the interactions between electrons and the crystal lattice structure of the material. By using the Kubo formula, scientists and engineers can predict how well a material will conduct electricity based on its physical properties.
What is the difference between physical structure and logical structure of a disk?
Physical structure refers to the actual layout of data on the disk, including sectors, tracks, and cylinders. Logical structure refers to how the operating system organizes and accesses data on the disk, such as partitions, file systems, and directories.
