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The internal resistance of an ideal voltage source is zero; it is able to supply or absorb any amount of current. The current through an ideal voltage source is completely determined by the external circuit. When connected to an open circuit, there is zero current and thus zero power.
A World War I poster for the US Shipping Board, ca. 1917–18.. The Emergency Fleet Corporation (EFC) was established by the United States Shipping Board, sometimes referred to as the War Shipping Board, on 16 April 1917 [1] pursuant to the Shipping Act (39 Stat. 729) to acquire, maintain, and operate merchant ships to meet national defense, foreign and domestic commerce during World War I.
Entry-Level Power Supply Specification (EPS) is a power supply unit meant for high-power-consumption computers and entry-level servers. Developed by the Server System Infrastructure (SSI) forum, a group of companies including Intel, Dell, Hewlett-Packard and others, that works on server standards, the EPS form factor is a derivative of the ATX ...
This is a list of current automotive parts suppliers, arranged in alphabetical order. The year of foundation is shown in brackets. A Autobacs Seven (1947) Automotive ...
Sources of electrical power: Battery – acid- or alkali-based power supply. Fuel cell – an electrochemical generator; Power supply – usually a main hook-up; Photovoltaic device – generates electricity from light; Thermoelectric generator – generates electricity from temperature gradients; Electrical generator – an electromechanical ...
It is essential to select the suitable material for the application, as the correct ferrite for a 100 kHz switching supply (high inductance, low loss, low frequency) is quite different from that for an RF transformer or ferrite rod antenna, (high frequency, low loss, but lower inductance), and different again from a suppression ferrite (high ...
Examples of such systems include modern cell phones, with GND and voltages such as 1.2 V, 1.8 V, 2.4 V, 3.3 V, and PCs, with GND and voltages such as −5 V, 3.3 V, 5 V, 12 V. Power-sensitive designs often have multiple power rails at a given voltage, using them to conserve energy by switching off supplies to components that are not in active use.
But when the load resistance approaches zero (a short circuit), the current (and thus power) approach infinity. Such a theoretical device has a zero ohm output impedance in series with the source. Real-world voltage sources instead have a non-zero output impedance, which is preferably very low (often much less than 1 ohm).
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