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Bridges
The bridge circuit shown above is known as the Maxwell-Wien bridge (often called the Maxwell…
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Resonant Circuits
Eddy current probes typically have a frequency or a range of frequencies that they are…
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Eddy Current Instruments
Eddy current instruments can be purchased in a large variety of configurations. Both analog and digital instruments…
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Phase Lag
Phase lag is a parameter of the eddy current signal that makes it possible to…
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Depth of Penetration & Current Density
Eddy currents are closed loops of induced current circulating in planes perpendicular to the magnetic…
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Impedance
Electrical Impedance (Z), is the total opposition that a circuit presents to alternating current. Impedance is…
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Circuits and Phase
A circuit can be thought of as a closed path in which current flows through…
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Mutual Inductance
The magnetic flux through a circuit can be related to the current in that circuit…
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Self-Inductance and Inductive Reactance
The property of self-inductance is a particular form of electromagnetic induction. Self inductance is defined as the…
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Induction and Inductance
Induction In 1824, Oersted discovered that current passing though a coil created a magnetic field capable of shifting a…