impedance

美 { "us": "", "uk": "" }
英 { "us": "", "uk": "" }
数据源: ai_enrichment
阻抗是电路中对交流电流的阻碍作用,通常用于电子工程和物理学领域,表示电阻和电抗的组合。

用法要点

句型搭配

常用于描述电路特性,如“measure impedance”(测量阻抗)或“reduce impedance”(降低阻抗),在技术文档中常见被动语态。

• measure the impedance
• impedance is measured
• reduce impedance

介词用法

常与介词“of”连用表示所属,如“impedance of the circuit”(电路的阻抗),或与“to”表示对某物的阻抗,如“impedance to current”(对电流的阻抗)。

• impedance of the system
• impedance to signal flow

语域说明

主要用于学术、工程和技术语境,如电子学、声学或医学成像,在日常对话中较少使用,属于专业术语。

• acoustic impedance
• electrical impedance

基础例句

The technician measured the impedance of the speaker to ensure it matches the amplifier.

技术员测量了扬声器的阻抗,以确保它与放大器匹配。

In this simple circuit, the impedance is too high for the current to flow efficiently.

在这个简单电路中,阻抗太高,电流无法有效流动。

You can reduce impedance by using thicker wires in your audio setup.

在音频设置中使用更粗的电线可以降低阻抗。

高级例句

The research paper discusses how acoustic impedance affects ultrasound imaging in medical diagnostics.

这篇研究论文讨论了声阻抗如何影响医学诊断中的超声成像。

Engineers optimized the transmission line by adjusting the characteristic impedance to minimize signal loss.

工程师通过调整特性阻抗来优化传输线,以最小化信号损失。

In the business meeting, they analyzed the impedance mismatch between the old and new systems to plan upgrades.

在商务会议中,他们分析了新旧系统之间的阻抗不匹配,以规划升级方案。

高频搭配

verb

measure impedancecalculate impedancereduce impedancematch impedanceadjust impedance

adjective

high impedancelow impedancecharacteristic impedanceinput impedanceoutput impedance

noun

circuit impedanceload impedancesource impedanceimpedance matchingimpedance analyzer

adverb

electrically impedanceacoustically impedance

preposition

impedance ofimpedance toimpedance in

phrase

impedance mismatchimpedance spectroscopyimpedance control

常见错误

❌ 错误:The impedance is resist.
✓ 正确:The impedance is resistance.

错误:将名词“impedance”误用为动词“resist”。正确:应使用名词形式“resistance”或保持“impedance”作为名词,因为“impedance”是专业术语,指阻碍作用,不是动词。

❌ 错误:This circuit has a high impedance to heat.
✓ 正确:This circuit has a high resistance to heat.

错误:将“impedance”误用于热阻语境。正确:在热学中应使用“resistance”,因为“impedance”特指对交流电或波的阻碍,不适用于热流。

近义词辨析

resistance

“resistance”通常指直流电路中对电流的阻碍,而“impedance”包括电阻和电抗,用于交流电路,更全面。

Resistance is measured in ohms for DC circuits, while impedance considers both resistance and reactance in AC systems.

reactance

“reactance”是阻抗的一部分,特指由电容或电感引起的阻碍,不包含电阻;而“impedance”是总阻碍,包含电阻和电抗。

Reactance varies with frequency in AC circuits, but impedance combines it with resistance for overall opposition.