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Physics Study Guide (Print Version) Units Linear Motion Force Momentum Normal Force and Friction Work Energy Torque & Circular Motion Fluids Fields Gravity Waves Wave overtones Standing Waves Sound Thermodynamics Electricity Magnetism Optics Physical Constants Frictional Coefficients Greek Alphabet Logarithms Vectors and Scalars Other Topics

Electronics is the application of electromagnetic (and quantum) theory to construct devices that can perform useful tasks, from as simple as electrical heaters or light bulbs to as complex as the Large Hadron Collider.

Contents 1 Electronics 1.1 Introduction 1.2 Circuits 1.3 Direct current and alternating current 1.4 Basic components 1.5 Ohm's law 1.6 Kirchoff's laws 1.7 Power 1.8 Resistors in series 1.9 Resistors in parallell 1.10 Superposition of sources 1.11 Capacitors 1.12 Inductances 1.13 Frequency-dependent circuits 1.14 Semiconductors

[edit] Electronics

[edit] Introduction

To discuss electronics we need the basics concepts from electricity: charge, current which is flow of charge, and potential which is the potential energy difference between two places. Please make sure these concepts are familiar before continuing.

[edit] Circuits

The interest of electronics is circuits. A circuit consists of wires that connect components. Typical components are resistors, voltage sources and so on, which will be discussed later. A circuit can be open, when there is a break so that no current can flow, or it can be closed, so that current can flow. These definitions allow us to discuss electronics efficiently.

[edit] Direct current and alternating current

[edit] Basic components

[edit] Ohm's law

[edit] Kirchoff's laws

[edit] Power

[edit] Resistors in series

[edit] Resistors in parallell

[edit] Superposition of sources

[edit] Capacitors

[edit] Inductances

[edit] Frequency-dependent circuits

[edit] Semiconductors

Current is the rate of flow of charge.

I = Current [amperes - A]
Q = Charge [coulombs - C]
T = Time [seconds - s]

howstuffworks.com

Voltage is equal to current multiplied by resistance

Power is equal to the product of voltage and current

Electronics is the flow of current through semiconductor devices like silicon and germanium.

Semiconductor devices are those which behave like conductors at higher temperature.

Transistor, diode, SCR are some electronic devices.

[[Category:Physics Study Guide]