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Equivalent Capacitance01:19

Equivalent Capacitance

721
From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
721
Equivalent Capacitance01:19

Equivalent Capacitance

2.2K
Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
2.2K
Capacitors and Capacitance01:18

Capacitors and Capacitance

9.6K
A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
9.6K
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

1.6K
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
1.6K
Capacitance: Single-Phase And Three-Phase Line01:25

Capacitance: Single-Phase And Three-Phase Line

618
In electrical power systems, understanding the capacitance of transmission lines is fundamental for efficient operation.
Single-Phase Lines
Consider a single-phase, two-wire transmission line with equal phase spacing energized by a voltage source. One conductor carries a uniform positive charge, while the other carries an equal negative charge. The capacitance C of the line can be derived from the voltage V between the conductors. For a one-meter section of the line, the capacitance is given...
618
Chromatographic Resolution01:15

Chromatographic Resolution

2.2K
In chromatography, a solute moves through a chromatographic column and tends to spread, forming a Gaussian-shaped band. The longer the solute spends in the column, the broader the band becomes. The broadening can lead to overlaps within the column, affecting separation effectiveness.
The effectiveness of separation can be evaluated by determining the level of separation between two neighboring peaks in a chromatogram, which represents the individual components of a sample.
In chromatography,...
2.2K

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相关实验视频

Updated: Feb 13, 2026

Miniaturized Sample Preparation for Transmission Electron Microscopy
09:04

Miniaturized Sample Preparation for Transmission Electron Microscopy

Published on: July 27, 2018

20.6K

使用微型薄样本的高分辨率电容扩散计,使用小型扩散计.

R Küchler1, S N Panja2, S Wirth1

  • 1Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany.

The Review of scientific instruments
|February 12, 2026
PubMed
概括

我们开发了一种高分辨率电容扩散计,用于表征超薄量子材料. 这种新方法可以精确测量纳米水晶中的热膨胀和磁收缩,从而推进对奇特量子现象的研究.

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Last Updated: Feb 13, 2026

Miniaturized Sample Preparation for Transmission Electron Microscopy
09:04

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Published on: July 27, 2018

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Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging
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Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging

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Test Samples for Optimizing STORM Super-Resolution Microscopy
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科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 材料科学 材料科学 材料科学
  • 量子材料科学 量子材料科学

背景情况:

  • 量子材料表现出诸如超导和拓秩序之类的奇异现象.
  • 这些材料通常以超薄晶体的形式存在,不适合传统的表征方法.
  • 精确测量物理属性对于理解新出现的量子行为至关重要.

研究的目的:

  • 为介绍一种新的,高分辨率的电容宽度计,用于表征超薄量子材料.
  • 为了在缩小尺寸系统中精确测量热膨胀和磁收缩.
  • 扩大扩散度的适用于纳米级晶体样本的应用.

主要方法:

  • 设计了一种高分辨率电容宽度计,采用修改的样品安装配置.
  • 启用在平面上的晶体测量,用于样品<500微米厚度.
  • 使用厚度低至40微米的银,EuB6和AgCrS2单晶的验证性能.

主要成果:

  • 在超薄量子材料上展示了可靠的高分辨率热膨胀和磁收缩测量.
  • 成功表征的样本显著低于常规扩展度的极限.
  • 证实了修改后的宽度计在各种材料类型和性能上的有效性.

结论:

  • 开发的电容扩散计是研究量子材料的强大工具.
  • 这一进步显著扩大了缩小尺寸量子系统的扩散度的范围.
  • 能够更深入地了解纳米级材料中新出现的现象.