Measuringdevices ohmmeter

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: to the total resistance. 28 EE1002 Introduction to Circuits and Systems Current Division i1 i2 I Fig. Parallel circuit The current I is passing through the two resistors in parallel (its equivalent being voltage at the output of the current source v R1 R2 ) so R1 R2 R1 R2 I . R1 R2 Then, i1 R2 v I R1 R1 R2 v R1 i2 I R2 R1 R2 Current division principle: For the two resistances in parallel, the current flowing in a resistance is a fraction of the total current equal to the ratio of the other resistor to the sum of both the resistors. This principle applies to only two resistances in parallel. For more resistances in parallel, we combine resistances to reduce to the two resistance case. 29 EE1002 Introduction to Circuits and Systems Practical Voltage and Current Sources In practice, the voltage sources like batteries will have an internal resistance, across which there will be a voltage drop. The voltage output at the terminals of the supply will be dependent on the load, higher the load current, lesser will be...
View Full Document

This document was uploaded on 01/20/2014.

Ask a homework question - tutors are online