Internal Resistance using Potentiometer Calculator

Calculate Internal Resistance







Formula

The formula to calculate Internal Resistance (r) is:

\[ r = \frac{L - l_2}{l_2} \cdot \Omega \]

Where:

Definition

Internal Resistance is the opposition to the flow of electric current within a conductor, measured in ohms, affecting the overall circuit performance.

Length is the distance between two points in a circuit, measured in meters, and is a fundamental parameter in electric current calculations.

Final Length is the total length of a wire or conductor in an electric circuit, including all its components and connections.

Final Resistance is the opposition to the flow of electric current in a circuit, measured in ohms, and depends on the material and its dimensions.

How to calculate Internal Resistance using Potentiometer

Let's assume the following values:

Using the formula:

\[ r = \frac{L - l_2}{l_2} \cdot \Omega \]

Evaluating:

\[ r = \frac{1.5 - 1.2}{1.2} \cdot 50 \]

The Internal Resistance is 12.5 Ohms.

Internal Resistance Conversion Chart

Length (L, m) Final Length (l2, m) Final Resistance (Ω, Ohms) Internal Resistance (r, Ohms)
1 1 40 0.0000
1 1 45 0.0000
1 1 50 0.0000
1 1 55 0.0000
1 1 60 0.0000
1 1.1 40 -3.6364
1 1.1 45 -4.0909
1 1.1 50 -4.5455
1 1.1 55 -5.0000
1 1.1 60 -5.4545
1 1.2 40 -6.6667
1 1.2 45 -7.5000
1 1.2 50 -8.3333
1 1.2 55 -9.1667
1 1.2 60 -10.0000
1 1.3 40 -9.2308
1 1.3 45 -10.3846
1 1.3 50 -11.5385
1 1.3 55 -12.6923
1 1.3 60 -13.8462
1 1.4 40 -11.4286
1 1.4 45 -12.8571
1 1.4 50 -14.2857
1 1.4 55 -15.7143
1 1.4 60 -17.1429
1.2 1 40 8.0000
1.2 1 45 9.0000
1.2 1 50 10.0000
1.2 1 55 11.0000
1.2 1 60 12.0000
1.2 1.1 40 3.6364
1.2 1.1 45 4.0909
1.2 1.1 50 4.5455
1.2 1.1 55 5.0000
1.2 1.1 60 5.4545
1.2 1.2 40 0.0000
1.2 1.2 45 0.0000
1.2 1.2 50 0.0000
1.2 1.2 55 0.0000
1.2 1.2 60 0.0000
1.2 1.3 40 -3.0769
1.2 1.3 45 -3.4615
1.2 1.3 50 -3.8462
1.2 1.3 55 -4.2308
1.2 1.3 60 -4.6154
1.2 1.4 40 -5.7143
1.2 1.4 45 -6.4286
1.2 1.4 50 -7.1429
1.2 1.4 55 -7.8571
1.2 1.4 60 -8.5714
1.4 1 40 16.0000
1.4 1 45 18.0000
1.4 1 50 20.0000
1.4 1 55 22.0000
1.4 1 60 24.0000
1.4 1.1 40 10.9091
1.4 1.1 45 12.2727
1.4 1.1 50 13.6364
1.4 1.1 55 15.0000
1.4 1.1 60 16.3636
1.4 1.2 40 6.6667
1.4 1.2 45 7.5000
1.4 1.2 50 8.3333
1.4 1.2 55 9.1667
1.4 1.2 60 10.0000
1.4 1.3 40 3.0769
1.4 1.3 45 3.4615
1.4 1.3 50 3.8462
1.4 1.3 55 4.2308
1.4 1.3 60 4.6154
1.4 1.4 40 0.0000
1.4 1.4 45 0.0000
1.4 1.4 50 0.0000
1.4 1.4 55 0.0000
1.4 1.4 60 0.0000
1.6 1 40 24.0000
1.6 1 45 27.0000
1.6 1 50 30.0000
1.6 1 55 33.0000
1.6 1 60 36.0000
1.6 1.1 40 18.1818
1.6 1.1 45 20.4545
1.6 1.1 50 22.7273
1.6 1.1 55 25.0000
1.6 1.1 60 27.2727
1.6 1.2 40 13.3333
1.6 1.2 45 15.0000
1.6 1.2 50 16.6667
1.6 1.2 55 18.3333
1.6 1.2 60 20.0000
1.6 1.3 40 9.2308
1.6 1.3 45 10.3846
1.6 1.3 50 11.5385
1.6 1.3 55 12.6923
1.6 1.3 60 13.8462
1.6 1.4 40 5.7143
1.6 1.4 45 6.4286
1.6 1.4 50 7.1429
1.6 1.4 55 7.8571
1.6 1.4 60 8.5714
1.8 1 40 32.0000
1.8 1 45 36.0000
1.8 1 50 40.0000
1.8 1 55 44.0000
1.8 1 60 48.0000
1.8 1.1 40 25.4545
1.8 1.1 45 28.6364
1.8 1.1 50 31.8182
1.8 1.1 55 35.0000
1.8 1.1 60 38.1818
1.8 1.2 40 20.0000
1.8 1.2 45 22.5000
1.8 1.2 50 25.0000
1.8 1.2 55 27.5000
1.8 1.2 60 30.0000
1.8 1.3 40 15.3846
1.8 1.3 45 17.3077
1.8 1.3 50 19.2308
1.8 1.3 55 21.1538
1.8 1.3 60 23.0769
1.8 1.4 40 11.4286
1.8 1.4 45 12.8571
1.8 1.4 50 14.2857
1.8 1.4 55 15.7143
1.8 1.4 60 17.1429
2 1 40 40.0000
2 1 45 45.0000
2 1 50 50.0000
2 1 55 55.0000
2 1 60 60.0000
2 1.1 40 32.7273
2 1.1 45 36.8182
2 1.1 50 40.9091
2 1.1 55 45.0000
2 1.1 60 49.0909
2 1.2 40 26.6667
2 1.2 45 30.0000
2 1.2 50 33.3333
2 1.2 55 36.6667
2 1.2 60 40.0000
2 1.3 40 21.5385
2 1.3 45 24.2308
2 1.3 50 26.9231
2 1.3 55 29.6154
2 1.3 60 32.3077
2 1.4 40 17.1429
2 1.4 45 19.2857
2 1.4 50 21.4286
2 1.4 55 23.5714
2 1.4 60 25.7143