Tag: Basic electrical engineering
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Alternating Currents and Voltages
Alternating current generator Let’s consider a signal turn coil rotating freely at a constant angular velocity symmetrically between the poles of a magnet as illustrated below: The ends of the loop are terminated in slip rings. As the loop rotates, side A will have an emf induced first in one direction and then in the…
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AC Circuits with Resistors, Inductors and Capacitors
Purely Resistive Circuits In resistive elements the current and voltage are in phase. Purely Capacitive Circuits In capacitive circuits, the current leads the voltage by 90°. Purely Inductive Circuits In inductive circuits the current lags the voltage by 90°. Related: Inductance R, L, and C in Series Because the voltages and the currents are not…
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Series and Parallel Circuits
Series Circuits The figure below shows three resistors R1, R2, and R3 connected end to end i.e. in series with a battery source of V volts. Since the circuit is closed, a current I flow and the voltage across each resistor may be determined from the voltmeter readings V1, V2, and V3. In a series…