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Series Circuit Answers
Series Circuit Answers

... 2) W hen two bulbs are connected in series, our m odel predicts; a) the ELECTRIC CURRENT through each bulb will be less or slow dow n b) the ELECTRIC POTENTIAL (VOLTAGE) across each bulb will be half of w hat it w as with one bulb in the circuit. 3) If we ignore the m eters, there is/are one differe ...
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... of the 100 W bulb being brighter is that such a bulb is brighter than a 40 W bulb when used at home. We could also argue that the bulbs are equally bright because they are in series, and therefore have the same current. The correct answer, however, is that the bulb marked as 40 W is brighter in this ...
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Switched-mode power supply



A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.
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