# How To Solve Circuit Problems

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).

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).

Question: A 3.0-ohm resistor and a 6.0-ohm resistor are connected in series in an operating electric circuit.

If the current through the 3.0-ohm resistor is 4.0 amperes, what is the potential difference across the 6.0-ohm resistor?

Answer: First, let's draw a picture of the situation.

If 4 amps of current is flowing through the 3-ohm resistor, then 4 amps of current must be flowing through the 6-ohm resistor according to Kirchhoff's Current Law.

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.Kirchhoff's Voltage Law (KVL) states that the sum of all the potential drops in any closed loop of a circuit has to equal zero.More simply, KVL is a method of applying the law of conservation of energy to a circuit.In fact, most circuits actually have elements of both types.Analyzing these circuits can be accomplished using the fundamentals you learned in analyzing series and parallel circuits separately and applying them in a logical sequence.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).In addition, we know the total potential drop for the entire circuit is 12V, and the entire circuit dissipated 24 m W of power.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.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.

## Comments How To Solve Circuit Problems

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