O que é corrente contínua e corrente alternada?

Understand the difference between direct and alternating current and why each plays a role in the transmission (HVDC) and use of electrical energy. This video is a summary, but it allows you to do an interesting mental exercise to understand why some components can behave differently when connected to alternating or direct voltage. Diodes, circuit breakers, reactors, transformers, capacitors, inductors, and fuses: each of these behaves differently when connected to direct or alternating voltage. The human body also reacts differently to direct and alternating voltage. In another video, we will cover some solved exercises on direct voltage in vehicles, using 12V. Among the objectives of this video, we highlight: Explanation of the concept of direct current and alternating current. Acronyms referring to the types of current and electrical voltage. Objective line 3 We cover the following topics throughout this video: Electric current can be of two types: direct current and alternating current. Direct current occurs when electrons in a voltage source follow only one direction, creating a continuous, unidirectional flow. Depending on the direction the electrons adopt, we can have a voltage source with positive or negative current, and the same applies to the voltage. Examples of direct current sources are batteries, solar cells, dynamos, alternating current rectifiers, etc. Alternating current occurs when electrons follow an ordered but bidirectional flow, meaning they move in two directions, typically back and forth. Because they move in both positive and negative directions, there is variation over time. The resulting pattern of this movement is a sinusoid. However, there are other waveforms that can also be alternating current, such as triangular, quadratic, and other waves. - Acronyms and their meanings: CC = direct current VCC = direct voltage DC = direct current VDC = voltage direct current CA = alternating current VAC = alternating voltage AC = alternate current VAC = voltage alternate current Highlighted parts of this video: 00:30 - Understand the fundamentals of electric current. 01:04 - See how to measure electric current with a multimeter. 01:44 - Voltage sources can be connected in two ways: series and parallel. Understand the characteristics of each. 02:25 - Using a multimeter, you can measure alternating voltage. 03:15 - Another key electrical quantity is voltage. Understand its characteristics 04:00 - Electrical frequency refers to the alternating polarization of the grid and can be modified with a frequency inverter. 04:35 - Understand the method for measuring electrical current in electrical panels. Other videos that complement this topic: What is electrical current?    • O que é corrente elétrica?   Measuring Current with a Multimeter    • Medir Corrente com Multímetro   Ohm's Law - Resistance, Current, and Voltage Formulas Explained    • Lei de Ohm - Fórmulas de resistência, corr...   Ohm's Law - Exercises and Solved Questions!    • Lei de Ohm - Exercícios e Questões resolvi...   Current in electrical panels with a clamp meter!    • Corrente em painéis elétricos com alicate ...   How to measure the total current in a home?    • Como medir a corrente total de uma residên...   Calculating Rated Current in a Three-Phase Motor!    • Cálculo de Corrente Nominal em motor Trifá...   Connecting Voltage Sources - Series and Parallel    • Associação de fontes de tensão - Série e P...   Among others, the following brands manufacture or are in some way related to the products used or mentioned in this video: -- O Mundo da Elétrica is an electricity channel with quality videos for you to learn on your cell phone, tablet, or on your living room TV. Electricity for everyone! Join the World of Electricity: On YouTube (click and subscribe): http://goo.gl/vXru8M World of Electricity Website: http://www.mundodaeletrica.com.br World of Electricity Facebook:   / mundodaeletrica   World of Electricity Google Plus: https://plus.google.com/+Mundodaeletr... World of Electricity Twitter:   / mundodaeletrica