Review the key terms, equations, and skills related to current, resistance, and resistivity, including how to find the current direction and what resistance depends on.

We look at the inductor i-v equations and notice how important it is to give inductor current a place to flow. Written by Willy McAllister. The inductor is one of the ideal circuit elements. Let's put an …

What is the current at the end of this pulse here? So, at two milliseconds, let's figure out what the current is, and that equals, at two milliseconds it's two times two milliseconds divided by 10 millihenries.

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A current flowing into a capacitor causes charge to accumulate. The voltage rises according to q = Cv and we say the capacitor integrates current.

Demonstrates the capacitor i-v equation by deriving the voltage on a capacitor driven by a current source. Written by Willy McAllister.

The voltage across the inductor (and therefore both resistors) is 0 . Ohm's Law tells us resistors with 0 volts have 0 current. When current through an inductor is constant, we say: The inductor "looks like" …

Our differential equation for the RLC can be turned into a "characteristic equation". It turns out the characteristic equation follows the general form of a quadratic equation...

Kirchhoff's Laws describe current in a node and voltage around a loop. These two laws are the foundation of advanced circuit analysis.

While Faraday's law tells us the magnitude of the emf produced, Lenz's law tells us the direction that current will flow: The induced emf generates a current in the loop. That current produces its own …