10. Reactance and Angular Velocity - Alternating Currents
by M. Bourne
Alternating Currents
An alternating current is created by rotating a coil of wire through a magnetic field. If the angular velocity of the wire is ω, the
capacitive reactance is given by:
inductive reactance is given by:
XL = ωL
Example:
If R = 10 Ω, L = 0.6 H, C = 200 μF and ω = 50 rad/s, find the magnitude of the impedance and the phase difference between the current and the voltage.
Angular Velocity and Frequency
In this section, recall that angular velocity and frequency are related by the expression:
ω = 2πf
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