How To Calculate The Voltage Drop Across a Resistor - Electronics

This electronics video tutorial explains how to calculate the voltage drop across a resistor using ohm's law. It contains a few examples and practice problems.

Electrical Formulas:

Electric Current & Circuits:

Internal Resistance of a Battery:

Resistors In Series:

Resistor Color Code:

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The Voltage Drop:

Kirchhoff's Voltage Law:

Kirchhoff's Current Law:

Resistors In Parallel:

Ohm's Law - Practice Problems:

Voltage Dividers:

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Current Dividers:

Current Divider With 3 Parallel Resistors:

Series and Parallel Circuits - Mega Review:

Equivalent Resistance of Complex Circuits:

Solving Equivalent Resistance Circuits:

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Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

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[Spoolsy]

Another method to do this without getting the current is to get the percentage. For example, R2 is 3 ohms. You would divide 3/R1+R2 = .6. Now multiple the .6 by the voltage of 20. It should give you 12V. That's the drop for R2. You can do this with as many resistors in a circuit.

P.S In a series circuit.

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