Recent Changes - Search:
<^< Examples: Kirchoff's Current Law | Course index | Kirchoff's Voltage Law >^>

Electronic circuits and components * Course Index * Introduction * About the Author * About this Course * Feedback * Course Navigation * How to use this Course * TINA * Locktronics

Fundamentals * Introduction: Fundamentals * Units and Multiples * Electricity * Electronic Principles * Electrical Circuits * Alternating Current * Assessment: Fundamentals

Passive Components * Introduction: Passive Components * Resistors * Capacitors * Inductors * Transformers * Batteries, Fuses, Lamps and Switches * Assessment: Passive Components

Semiconductors * Introduction: Semiconductors * Diodes * Transistors * Logic Gates * Assessment: Semiconductors

Passive Circuits * Introduction: Passive Circuits * Series and Parallel Connections * Kirchoff's Laws ## Kirchoff's Current Law ## Examples: Kirchoff's Current Law ##

Worksheet: Kirchoff's Current Law ## Kirchoff's Voltage Law ## Examples: Kirchoff's Voltage Law ## Worksheet: Kirchoff's Voltage Law * Potential and Current Dividers * Passive Time Variant Circuits * Assessment: Passive Circuits

Active Circuits * Introduction: Active Circuits * Power Supply Circuits * Operational Amplifier Circuits * Transistor Amplifier Circuits * 555 Timer Circuits * Assessment: Active Circuits

Parts Gallery * Introduction: Parts Gallery * Passive Component Images * Semiconductor Images * Other Images * Quizzes

(:Summary:Contains the 'action' links (like Browse, Edit, History, etc.), placed at the top of the page, see site page actions:) (:comment This page can be somewhat complex to figure out the first time you see it. Its contents are documented at PmWiki.SitePageActions if you need help. :) * Print (:comment (:if group Site,SiteAdmin,Cookbook,Profiles,PmWiki*:) (:comment delete if and ifend to enable backlinks:) * %item rel=nofollow class=backlinks accesskey='$[ak_backlinks]'% [[{*$Name}?action=search&q=link={*$FullName} | $[Backlinks] ]] (:ifend:) :) * Login

KirchoffsLaws /

Worksheet: Kirchoff's Current Law

<^< Examples: Kirchoff's Current Law | Course Index | Kirchoff's Voltage Law >^>(:nl:)

Objective: To investigate Kirchhoff's Current Law.
Underpinning knowledge: Voltage, current and resistance. Ohm's Law. Kirchhoff's Current Law.
Apparatus: TINA circuit file, or apparatus to make the following circuit.

TINA Circuit File: Click here to download circuit file
Initial Settings: 8V and 12V batteries. R'_1_' = 1k&#937;, R'_2_' = 2k&#937;, R'_3_' = 3k&#937;.
Requires: Paper, Linear graph paper, pen or pencil.
Instructions:

(a) Using initial settings verify that I'_1_' - I'_2_' + I'_3_' = 0 (or, more conveniently, that I'_1_' + I'_3_' = I'_2_').

(b) Change R'_1_' to 3k&#937;, R'_2_' to 1k&#937; and R'_3_' to 2k&#937;. Confirm, once again that I'_1_' - I'_2_' + I'_3_' = 0.

(c) Finally, make R'_1_' to 2k&#937;, R'_2_' to 3k&#937; and R'_3_' to 1k&#937;. Once again, confirm that I'_1_' - I'_2_' + I'_3_' = 0.

Observations:

(a) Is Kirchhoff's Current Law obeyed?

(b) The convention adopted in the formula, I'_1_' - I'_2_' + I'_3_' = 0, is that current flowing towards the junction is positive whilst current flowing away is negative. How is it possible to determine the direction of current in the circuit?

Further work:

Add a further battery of 10V and a fourth resistor of 4k&#937; in series with an ammeter connected to the junction in the circuit. Derive the Kirchhoff's Current Law equation for this new circuit (you will have to consider four currents in the circuit; I'_1_', I'_2_', I'_3_' and I'_4_') and confirm that the Current Law is obeyed by inserting measured values into the equation

(:nl:)(:table style="clear:both":)

(:Summary: Website page footer:)

Print - (:comment (:if group Site,SiteAdmin,Cookbook,Profiles,PmWiki*:) (:comment delete if and ifend to enable backlinks:) %item rel=nofollow class=backlinks accesskey='$[ak_backlinks]'% [[{*$Name}?action=search&q=link={*$FullName} | $[Backlinks] ]] (:ifend:) :) Search - Login

Page last modified on August 30, 2011, at 09:11 AM