Name: series resistors and voltage split
Uploaded: 2024-04-11T12:48:28.000Z
Duration: 1 min 14 s
Channel: JoVE

Em uma conexão em série, os resistores são ligados sequencialmente e a mesma corrente deve fluir através de cada um.
A tensão entre esses resistores pode ser expressa usando a lei de Ohm. De acordo com a lei de tensão de Kirchhoff, a soma da tensão entre os resistores é igual à tensão da fonte.
Como resultado, a corrente no circuito é igual à tensão da fonte dividida pela resistência total em série.
Substituindo a expressão de corrente na lei de Ohm, obtém-se a tensão em cada resistor.
Assim, a tensão da fonte é dividida proporcionalmente entre vários resistores de acordo com suas resistências individuais, o que é conhecido como o princípio da 'divisão de tensão'. Um circuito que demonstra esse princípio é chamado de divisor de tensão.
Uma combinação de resistores em série pode ser tratada como um único resistor equivalente.
A resistência deste resistor equivalente é igual à soma das resistências dos resistores individuais em série.
A resistência equivalente pode ser generalizada para qualquer número de resistores conectados em série.
Da mesma forma, uma expressão generalizada para queda de tensão entre esses resistores pode ser escrita.

divisores de tensão

Nos circuitos elétricos, os resistores podem ser conectados em série, ligados sequencialmente um após o outro. Numa configuração em série, a mesma corrente flui através de cada resistor. A lei de Ohm é um princípio fundamental para compreender o comportamento dos resistores em série. Ela expressa a tensão através desses resistores em termos de corrente e resistência.

A lei das tensões de Kirchhoff implica que a soma das tensões nos resistores em série é igual à tensão da fonte. Isso significa que a corrente no circuito é igual à tensão da fonte dividida pela resistência total em série. Essa expressão de corrente pode ser substituída na lei de Ohm para determinar a tensão em cada resistor. Este arranjo resulta em uma divisão proporcional da tensão da fonte entre vários resistores com base em suas resistências individuais. Este princípio é conhecido como “divisão de tensão”, e um circuito que exemplifica este princípio é chamado de “divisor de tensão”.

Uma combinação de resistores conectados em série pode ser tratada como um único resistor equivalente. O valor deste resistor equivalente é simplesmente a soma das resistências dos resistores individuais em série. Esse conceito se estende a qualquer número de resistores conectados em série.

<img alt="Equation1" src="/files/ftp_upload/15072/15072_PT_Equation_1.svg" style="text-align: center; height: 16px;" />

A queda de tensão em cada resistor em um circuito em série é diretamente proporcional à sua resistência. Como resultado, resistores com valores de resistência maiores sofrerão quedas de tensão mais significativas. Este princípio está no cerne dos divisores de tensão, onde a queda de tensão de cada resistor é determinada por sua resistência em relação à resistência total em série.

Na prática, combinar resistores em série ou paralelo é comum, necessitando muitas vezes de uma representação simplificada do circuito. Esta simplificação é conseguida combinando dois resistores ao mesmo tempo. A resistência equivalente de dois resistores em série é a soma de suas resistências individuais. Essa técnica facilita a análise de circuitos complexos, fornecendo aos engenheiros uma ferramenta valiosa para projetar e solucionar problemas de sistemas elétricos.

Divisores de Tensão

Em uma conexão em série, os resistores são ligados sequencialmente e a mesma corrente deve fluir através de cada um.
A tensão entre esses resistores pode ser ...

Education

JoVE Core

Electrical Engineering

Engenharia Elétrica

Unit 1

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Basics of Electric Circuits

Fundamentos de Circuitos Elétricos

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Voltage Dividers

series resistors and voltage split

Series resistors split voltage across a circuit. In a series setup, resistors are linked one after another. The same current flows through each resistor in the chain. To analyze this behavior, Ohm's law is used to relate voltage, current, and resistance.

Kirchhoff's voltage law says the voltages around a series loop add up to the source voltage. That means the current in the circuit equals the source voltage divided by the total resistance in series. The current value can then be used in Ohm's law to find the voltage across each resistor. This is the principle of voltage division.

A circuit that uses this principle is called a voltage divider. The source voltage is shared among the resistors in proportion to their resistance values. A resistor with a larger resistance gets a larger voltage drop. This relationship stays the same for any number of resistors in series.

Resistors in series can also be replaced by one equivalent resistor. Its resistance is the sum of the individual resistances. Circuit analysis often uses this idea when simplifying complex networks. Engineers combine two resistors at a time to make the circuit easier to study and troubleshoot.

Series Resistors and Voltage Split

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Series resistors split voltage across a circuit. In a series setup, resistors are linked one after another. The same current flows through each resistor in the chain. To analyze this behavior, Ohm's law is used to relate voltage, current, and resistance. Kirchhoff's voltage law says the voltages around a series loop add up to the source voltage. That means the current in the circuit equals the source voltage divided by the total resistance in series. The current value can then be used in Ohm's...

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Learn how resistors in series split source voltage, use Ohm's law and Kirchhoff's voltage law, and simplify circuits with equivalent resistance.

Series Resistors and Voltage Split | JoVE K12

JoVE Core Electrical Engineering offers easy-to-understand animated videos that cover fundamental concepts of electric circuits along with circuit analysis techniques. It incorporates first-order and second-order circuits using operational amplifiers and circuit transformation concepts. The inclusion of practical design examples and real-world applications through scientist-in-action videos adds significant educational value, making complex concepts accessible.

electrical engineering

Series Resistors and Voltage Split

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