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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 ## Electrostatics ## Electric Fields ## Capacitance ## Charge on a Capacitor ## Electric Field Strength ## Examples: Electric Field Strength ## The Unit of Capacitance ## Charge Capacitance and Voltage ## Energy Stored in a Capacitor ## Examples: Capacitance ## The Unit of Inductance ## Flux Linkage and Current ## Energy Stored in an Inductor ## Examples: Inductance ##

Magnetism ## Electromagnetism ## Magnetic Fields ## Electromagnets ## Magnetic Field Strength ## Examples: Magnetism * 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 * 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

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<^< Examples: Inductance | Course Index | Electromagnetism >^>(:nl:)

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We can demonstrate the force that exists between magnetic poles by suspending an ordinary bar magnet.

If a second bar magnet is held close to the suspended bar magnet so that like magnetic poles are adjacent, the suspended bar magnet will twist away from the other magnet, as shown.

This shows that "like poles repel".

Alternatively, if a second bar magnet is held close to the suspended bar magnet so that unlike magnetic poles are adjacent, then the suspended bar magnet will twist towards the other magnet, as shown.

This shows that "unlike poles attract". (:nl:)(:table style="clear:both":)

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Page last modified on July 18, 2011, at 08:48 AM