Calculating Resistance in Series and Parallel Circuits Basic

Calculating Resistance in Series and Parallel Circuits Basic Formulas for Rapid Computation of Circuit Resistance user@domain Jump to first page

Introduction n Informational lecture by Fred Baker n Electronics Instructor for U. S. Navy Jump to first page

Topics of Discussion n Resistance totaling values, dependent on the circuit structure Knowing how to calculate resistance depending on circuit structure Understanding these basics can save valuable time and effort Jump to first page

Resistance Rules for Series Circuits n Series circuits are always one-forone additive u Rt = R 1 + R 2 + R 3 + Rn Jump to first page

Series Circuit n Sample of a Series Circuit layout R 1 R 2 R 3 Jump to first page

Solving for Series Resistance n Calculate the resistance using the series formula: u Rt = R 1 + R 2 + R 3 + Rn u Rt = 20 W + 30 W + 50 W = 100 W R 1=20 W R 2=30 W R 3=50 W Jump to first page

Resistance Rules for Parallel Resistance Circuit n Parallel circuits are reciprocally additive u Rt = 1 1 + 1 R 2 R 3 Jump to first page

Parallel Circuit n Sample of a Parallel Circuit layout R 1=20 W R 2=30 W R 3=50 W Jump to first page

Solving for Parallel Resistance n Calculate using reciprocal formula: u Rt = 1 / 1/R 1 + 1/R 2 + 1/Rn u Rt = 1/1/20 W + 1/30 W + 1/50 W u Rt = 1/0. 05 W + 0. 033 W + 0. 02 W u Rt = 1/103 W = 9. 70 W R 1=20 W R 2=30 W R 3=50 W Jump to first page

Summary n n n Determine the type of circuit layout you are working with Apply the correct formula Verify answer by double-checking math Jump to first page