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This physics video tutorial explains how to solve any resistors in series and parallel combination circuit problems. The first thing you need to do is calculate the equivalent resistance of the circuit which you can use to calculate the current flowing from the battery based on ohm's law. Using the current and the voltage drops across each resistor, you can calculate the electric potential at every point in the circuit which will allow you to calculate the current flowing through any resistor. This technique is useful if there's not multiple batteries in different loops of the equation. Keep in mind, the current flowing in two resistors that are in series with each other is the same. The voltage is the same across resistors connected in parallel. This video contains plenty of examples and practice problems including a current division formula for resistors connected in parallel.

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This physics video tutorial provides a basic introduction into voltage divider circuits. It provides a simple formula to calculate the voltage across a resistor in a series circuit with two resistors in series with a battery. it contains plenty of examples and practice problems. It discusses the effect on the output voltage of a voltage divider circuit when a load resistor is placed in parallel with R2. It discusses how to design a voltage divider circuit to meet certain requirements.

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This physics video tutorial provides a basic introduction into parallel circuits. it explains how to calculate the electric current flowing through each resistor in a parallel circuit. The voltage across each resistor is the same in a parallel circuit and it's equal to the voltage of the battery. This tutorial explains how to solve parallel circuits with two resistors and with three resistors. It discusses how to calculate the power delivered by the battery to the circuit and the power absorbed by each resistor. Kirchoff's current law applies to parallel circuits which states that the total current entering a junction must equal to the total current leaving the junction - this is also known as the junction rule of kirchoff's law. This video uses the principles behind ohm's law to calculate the voltage, current, resistance, and power of an element or device in a circuit.

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