Name: capacitor charge and discharge
Uploaded: 2024-04-11T12:48:38.000Z
Duration: 1 min 15 s
Channel: JoVE

K12 Standards

Texas Essential Knowledge and Skills

High School

Chemistry and Physics

IPC.6

IPC.6.A

Capacitors

Las radios de coche utilizan condensadores para filtrar las frecuencias y obtener una recepción de señal clara.
Los condensadores constan de dos placas conductoras paralelas separadas por un dieléctrico y almacenan energía en su campo eléctrico.
Al conectar una fuente de voltaje, las cargas positivas y negativas se acumulan en placas opuestas, generando una diferencia de potencial que es igual al producto del campo eléctrico y la distancia entre las placas hasta que alcanza el voltaje de la fuente.
El campo eléctrico es proporcional a la densidad de carga, dada por la carga total dividida por el área de las placas.
La carga almacenada es directamente proporcional al voltaje aplicado, y la constante de proporcionalidad, conocida como capacitancia, indica la cantidad de carga almacenada para crear una diferencia de potencial dada. Se mide en faradios.
Para condensadores con un dieléctrico, la capacitancia es directamente proporcional al área de la placa y la permitividad dieléctrica, pero inversamente proporcional a la distancia entre las placas.
Diferenciando la ecuación de carga-voltaje de un condensador con respecto al tiempo se obtiene la corriente.
Los condensadores cargados se descargan cuando se conectan a una carga, y los electrones fluyen en dirección inversa hasta que el potencial llega a cero.

condensadores

Los condensadores desempeñan un papel crucial en las radios de los automóviles, donde filtran y almacenan frecuencias para garantizar una recepción clara de la señal. Los condensadores, que sirven esencialmente como dispositivos de almacenamiento de energía, almacenan energía dentro de su campo eléctrico y están compuestos por dos placas conductoras paralelas separadas por un dieléctrico. Cuando se conecta una fuente de voltaje a un capacitor, se acumulan cargas positivas y negativas en las placas opuestas. Esta acumulación genera una diferencia de potencial que es igual al producto del campo eléctrico por la distancia entre las placas. Este proceso continúa hasta que la diferencia de potencial alcanza el voltaje de la fuente. El campo eléctrico dentro de un capacitor es proporcional a la carga almacenada en las placas y al área de las placas. La carga almacenada es directamente proporcional al voltaje aplicado. La constante de proporcionalidad en esta relación se conoce como capacitancia, que indica la cantidad de carga necesaria para crear una diferencia de potencial determinada. La unidad utilizada para medir la capacitancia es el faradio. Para los condensadores de placas paralelas, la capacitancia es directamente proporcional al área de la placa y la permitividad del dieléctrico, que es la capacidad del material para almacenar energía eléctrica. Mientras tanto, la capacitancia es inversamente proporcional a la distancia entre las placas; cuanto más cerca estén las placas, mayor será la capacitancia. Al diferenciar la ecuación carga-voltaje de un capacitor con respecto al tiempo, se puede derivar la corriente que fluye a través del capacitor. Esto es particularmente importante al considerar cómo se comportan los capacitores en los diseños de circuitos. Además, cuando un condensador cargado se conecta a una carga, se descarga. Durante este proceso de descarga, los electrones fluyen en dirección inversa hasta que la diferencia de potencial entre las placas llega a cero. Esta capacidad de almacenar y liberar energía eléctrica hace que los condensadores sean componentes invaluables en muchos dispositivos electrónicos. Al comprender cómo funcionan, los ingenieros pueden diseñar sistemas electrónicos más eficaces y eficientes.

Condensadores

Las radios de coche utilizan condensadores para filtrar las frecuencias y obtener una recepción de señal clara.
Los condensadores constan de dos placas conductoras paralelas separadas ...

Education

Educación

JoVE Core

Electrical Engineering

Ingeniería Eléctrica

Unit 1

Unidad 1

Energy Storage Elements

Elementos de almacenamiento de energía

KEY TERMS AND CONCEPTS

TÉRMINOS Y CONCEPTOS CLAVE

capacitor charge and discharge

Capacitors store electric energy and help control signals in devices like car radios. They work by holding charge on two parallel conducting plates with a dielectric, which is the insulating material between the plates.

When a voltage source is connected, positive charge builds up on one plate and negative charge builds up on the other. This charge separation creates a potential difference, and it keeps increasing until it matches the source voltage. The electric field inside the capacitor depends on the charge on the plates and the plate area.

The amount of charge stored is directly proportional to the applied voltage. The constant that links charge and voltage is called capacitance, and it is measured in farads. For a parallel plate capacitor, capacitance increases with larger plate area and with higher permittivity of the dielectric. Permittivity describes how well a material stores electrical energy. Capacitance also decreases when the plates are farther apart, so closer plates give a higher capacitance.

Capacitors also affect current in circuits. If the charge-voltage equation is differentiated with respect to time, it gives the current through the capacitor. When a charged capacitor is connected to a load, it discharges. Electrons then flow in the reverse direction until the potential difference drops to zero. This ability to store and release energy makes capacitors important in many electronic systems.

Capacitor Charge and Discharge

capacitors

Capacitors store electric energy and help control signals in devices like car radios. They work by holding charge on two parallel conducting plates with a dielectric, which is the insulating material between the plates. When a voltage source is connected, positive charge builds up on one plate and negative charge builds up on the other. This charge separation creates a potential difference, and it keeps increasing until it matches the source voltage. The electric field inside the capacitor...

energy stored in capacitors

Capacitor Voltage and Charge Behavior

Capacitor voltage and charge behavior depend on how a parallel plate capacitor connects to a battery. When the battery is attached, a potential difference forms across the plates. That voltage determines how much electrical energy the capacitor can store. The voltage across a capacitor can be found by integrating the equation that links voltage and current. That relationship lets students predict the voltage at any moment during charging or discharging. It also shows why a capacitor keeps a...

series and parallel capacitors

Capacitance in Series and Parallel

Capacitors in series and parallel affect a circuit in different ways. These arrangements change the total capacitance, which is the circuit's overall ability to store charge. Knowing the difference helps explain how a circuit responds to signals. When capacitors are connected in series to a battery, the plate tied to the battery's positive terminal becomes positively charged. The plate connected to the negative terminal becomes negatively charged. The other plates develop equal and opposite...

equivalent capacitance

Capacitors in Series and Parallel

Capacitors in series and parallel can be simplified by replacing the group with one equivalent capacitor. This equivalent capacitor stores the same charge as the original network when the same potential difference is applied. The idea helps make complex capacitor circuits easier to analyze. In a parallel connection, capacitors share the same voltage across each branch. The equivalent capacitance of N capacitors in parallel is the sum of their individual capacitances. This type of connection...

inductors

Inductors in Electric Circuits

Inductors are passive components used in electric circuits to store energy in a magnetic field. They are often made by coiling a wire around a magnetic core. This structure gives the component its inductive behavior and its ability to respond to changing current. When current flows through an inductor, the voltage across it is proportional to how quickly the current changes with time. This relationship is written using the passive sign convention, and the constant of proportionality is called...

energy stored in inductors

How Inductor Current Stores Magnetic Energy

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series and parallel inductors

Equivalent Inductance in Circuit Networks

Equivalent inductance in circuit networks helps simplify circuits with multiple inductors. When inductors are combined, the circuit can often be replaced by one inductor with the same effect on the current and voltage. For inductors in series, the same current flows through each component. Applying Kirchhoff's voltage law shows that the total voltage is the sum of the inductor voltages. As a result, the equivalent inductance of a series group is the sum of the individual inductances. This is...

design example: automobile ignition system

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Car Spark Coil Voltage Design Example

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key terms and concepts

Learn how capacitors store charge, build potential difference, and discharge in circuits. See how plate area, distance, and dielectric affect capacitance.

Capacitor Charge and Discharge | 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

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Car radios utilize capacitors to filter frequencies for clear signal reception.
Capacitors consist of two parallel conducting plates separated by a ...

Energy Stored in Capacitors

A parallel plate capacitor connected to a battery develops a potential difference across its plates.
By integrating the equation relating voltage and ...

Series and Parallel Capacitors

Capacitors can be connected in series and/or parallel configurations within a circuit.
Consider the capacitors connected in series to a battery; the plate ...

Equivalent Capacitance

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Inductors

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When the current is constant, ...

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IPC.6.B

Energy

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IPC.6.C

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IPC.6.D

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IPC.6.E

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IPC.6.F

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IPC.6.G

Science concepts. The student knows the impact of energy transfer and energy conservation in everyday life. The student is expected to:

Capacitor Charge and Discharge

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