Voltage Divider Circuit Explained!

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.

Schematic Diagrams & Symbols:

Resistors In Series:

Resistors In Parallel:

Series and Parallel Circuits - Light Bulb Brightness:

Equivalent Resistance of Complex Circuits:

How To Solve DC Circuits:

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Current Dividers:

Parallel Circuit Challenge Problem:

Kirchhoff's Current Law:

Kirchhoff's Voltage Law:

DC Circuits Review:

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KCL and KVL Circuit Analysis:

Thevenin's Theorem - Circuit Analysis:

Norton's Theorem - Circuit Analysis:

Superposition Theorem:

Maximum Power Transfer:

Physics PDF Worksheets:

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[pumbo_nv]

Wow! Before watching this video I watched and read many other tutorials on voltage dividers, but still was confused and had many question. Now I finally understand. Thanks.

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[killakuri]

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[xorpe]

At 17:53, does he know that the voltage around R2 is 3V due to the fact that the device needs a voltage of 3V and voltage is the same across parallel branches?

[SnoozeDog]

For #5 how does he know that R2 should be approx 100times less to get 3V?

[PipenFalzy]

When I have 20vt, and know vo is 12v that tells you to get r1 is 8v (20v-12v) x .05a is 160 ohms. r2 = 12v /.05a =240.
You seemed to do more work to get the same answer.

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[general_prodigy]

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[haroldsajeev]

In question 5....how did you get R2 as 50 ohms