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Current Divider

Posted by Jeff on Aug 10, 2009 in Basic Electrical Engineering Concepts, Circuit Theory

Current dividers are the inverse of voltage dividers.  Voltage dividers work with series circuits where current remains constant; any parallel components must be combined before the voltage divider equation works.  In contrast, current dividers work with parallel circuits where the voltage is the same across all components and any series components must be combined before [...]

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Ohm’s Law

Posted by Jeff on Jul 26, 2009 in Basic Electrical Engineering Concepts, Circuit Theory

Ohm’s law defines the relationship between voltage, current, and resistance by the equation below.  The second equation better represents voltage as the difference between two electric potentials. Note that V1 and V2 are voltages measured with respect to ground and V is the voltage potential measured between them. The equation derived from Ohm’s law is [...]

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Mesh Current

Posted by Jeff on Jul 23, 2009 in Circuit Theory

Here I will show you how to calculate the different currents in each loop of the figure below using the mesh current method. This is my favorite approach to a problem like this one: 1) Identify meshes in a planar circuit. 2) Identify currents unknown. 3) Write KVL for each mesh. 4) Simplify and Solve. [...]

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