How To Solve Circuit Problems

How To Solve Circuit Problems-81
Kirchhoff's Current Law (KCL), named after German physicist Gustav Kirchhoff, states that the sum of all current entering any point in a circuit has to equal the sum of all current leaving any point in a circuit.More simply, this is another way of looking at the law of conservation of charge.We know the potential drop across each resistor (4V), the current through each resistor (2 m A), and the power dissipated by each resistor (8 m W).

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Combining your knowledge of Ohm's Law, Kirchoff's Current Law, Kirchoff's Voltage Law, and equivalent resistance, you can use this table to solve for the details of any circuit.

A VIRP table describes the potential drop (V-voltage), current flow (I-current), resistance (R) and power dissipated (P-power) for each element in your circuit, as well as for the circuit as a whole.

Developing an understanding of circuits is the first step in learning about the modern-day electronic devices that dominate what is becoming known as the "Information Age." A basic circuit type, the series circuit, is a circuit in which there is only a single current path.

Kirchhoff's Laws provide us the tools in order to analyze any type of circuit.

To find the equivalent resistance of any number of series resistors, we just add up their individual resistances: Note that because there is only a single current path, the same current must flow through each of the resistors.

A simple and straightforward method for analyzing circuits involves creating a VIRP table for each circuit you encounter.

Let's use our circuit with the three 2000-ohm resistors as an example to demonstrate how a VIRP table is used.

To create the VIRP table, we first list our circuit elements, and total, in the rows of the table, then make columns for V, I, R, and P: Next, we fill in the information in the table that we know.

A Resistor is a small component of a circuit used to change how much resistance is within the circuit. Parallel resistors look like a “ladder” on a circuit, each one is stacked on top of each other so to speak. To find the total resistance of a series configuration, you simply add them together. To find the total resistance of a parallel configuration, we must divide one by each resistor value separately, add them together, then divide one by this total.

For example, if you have three resistors R1, R2, and R3, the total resistance is as such “R=R1 R2 R3”. Such as (1/R1 1/R2 1/R3) = 1/R ==Once you have found the total resistance (R) and given voltage (V) we plug it into the Ohm’s Law equation (I=V/R).


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