that controls the output voltage or current to a specific value; the controlled value is held nearly constant despite variations in either load current or the voltage supplied by the power supply’s energy source. Power supplies for electronic devices can be broadly divided into line-frequency (or "conventional") and switching power supplies. The line-frequency supply is usually a relatively simple design‚ but it becomes increasingly bulky and heavy for high-current equipment due to the need for large
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nature of the material. In a gas discharge‚ such as a fluorescent lamp‚ current causes resistance to decrease. This is because as more electrons and ions flow through a particular area‚ they bump into more atoms‚ which frees up electrons‚ creating more charged particles. In this way‚ current will climb on its own in a gas discharge‚ as long as there is adequate voltage (and household AC current has a lot of voltage). If the current in a fluorescent light isn’t controlled‚ it can blow out the various
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magnetization. Direct magnetization occurs when the electric current is passed through the test object and a magnetic field is formed in the material. Indirect magnetization occurs when no electric current is passed through the test object‚ but a magnetic field is applied from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current which may be either alternating current (AC) or some form of direct current (DC) (rectified AC). Magnetic particle inspection
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Section 7: Energy Efficiency www.leonardo-energy.org February 2007 Power Quality & Utilisation Guide Induction Heating Jean Callebaut‚ Laborelec 1 2 Introduction.................................................................................................... 2 Physical principles ....................................................................................... 2 2.1 2.2 2.3 Electromagnetic induction ..............................................................................
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The Amazing Nikola Tesla Adam Professor Charles B. Daniels ENMA 301: ENGINEERING MANAGEMENT 08 April 2012 Abstract Nikola Tesla was the most underappreciated scientist of all time. In spite of his lack of funding‚ trust‚ and support; Tesla was one of the most successful inventors that the world has ever seen. From AC generators to wireless transmission of electricity to invisible death rays; Tesla envisioned countless world changing inventions. With proper funding and support‚ we can
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The Force Between Two Parallel Current Carrying Conductors Aim: To observe the direction of the forces between two parallel CCDs. Hypothesis: That the CCD with current flow in the same direction will be attracted to each other and CCDs with current flow in opposite directions will repel. Apparatus: -Variable DC power supply * Variable resistor (15ohm rheostat) * Connecting wires * Retort stand * Clamp * Two pieces of thick card or balsa wood 10cmx10cm * Two strips of
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201020177 Abstract—In this document a DC (Direct Current) to AC (Alternating Current) conversion method using an H-Bridge will be introduced; components‚ simulation and hardware implementation will be presented. Index Terms— H-Bridge‚ DC to AC conversion‚ Power electronic application‚ Simulation. I. INTRODUCTION A power inverter‚ or inverter‚ is an electronic device or circuitry that changes direct current (DC) to alternating current (AC).[1] The input voltage‚ output voltage and frequency
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instruments properly and measurements alternating current correctly. One of the most common and economical methods for measuring alternating currents is to rectify these currents and read the resultant DC on an analog or digital volt-ohm meter (VOM). You need to take many considerations into account when using rectification: what type of rectification you use‚ what scale conversion you will need‚ and the sensitivity of the meter. RECTIFICATION Alternating current periodically changes direction‚ which
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(kay rap)DEFINITION OF TERMS AC (alternating current) - In electricity‚ alternating current (AC) occurs when charge carriers in a conductor or semiconductor periodically reverse their direction of movement. Household utility current in most countries is AC with a frequency of 60 hertz (60 complete cycles per second)‚ although in some countries it is 50 Hz. The radio-frequency (RF) current in antennas and transmission lines is another example of AC. The usual waveform of an AC power circuit is a sine
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electrical science and industry. His invention of the Alternative Current‚ more commonly known today as A/C‚ changed the course of history for the entire world. Tesla was not recognized in his time for making his mark on the world as he did‚ but today he is revered as one of the pioneers in his field. This man has made such a huge impact that he has been called one of the Great Progressive People. And his title is well deserved. Alternative Current One of Nikola Tesla’s greatest achievements was the A/C‚
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