'Rms voltage' diaporamas de présentation

Electronic devices and circuits

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Electrical principles

City and Guilds 2365 Certificate in Electro-technical Technology Level 3 Unit 1 Outcome 4 Session 1. Electrical principles. Outcome 4 Electrical principles. The aim of today is to understand the average and RMS values in an AC circuit. Objectives:

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ACOUSTICS LAB

ACOUSTICS LAB. ME4053. Objectives: Study the propagation of sound waves from a loudspeaker and compare with a simple theoretical model. Specifically:. Measure the speed of sound Show that acoustic pressure falls off like 1/R in the far-field

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E X AM 2

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OVERVOLTAGE IMMUNITY OF ELECTRICAL APPLIANCES LABORATORY TEST RESULTS FROM 60 APPLIANCES

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Alternating Current and RMS Derivation Whiteboards

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Alternating Currents

Current That Is Changing All the Time. Alternating Currents. Key Concepts. A direct current travels in one direction only. In alternating currents the direction of charge flow is changing all the time. The change in direction from forwards to backwards to forwards again is called a cycle .

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As the frequency supplied by the generator drops lower, (1) bulb A brightens, bulb B dims. (2) bulb A brightens, bulb

A B As the frequency supplied by the generator drops lower, (1) bulb A brightens, bulb B dims. (2) bulb A brightens, bulb B remains unchanged. (3) bulb A dims, bulb B brightens. (4) bulb A dims, bulb B remains unchanged. (5) both bulbs brighten. (6) both bulbs dim. A B

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Measures of Power Quality (1)

Measures of Power Quality (1). Displacement Power Factor (Displacement Factor) ? = Cosine of phase shift between fundamental component of line current and the associated phase voltage (ie I A and V AN )

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