FCC E6D - 电路元件与半导体

#E6D01🔗

What is piezoelectricity?

什么是压电？

The ability of materials to generate electromagnetic waves of a certain frequency when voltage is applied

材料在施加电压时产生一定频率电磁波的能力

A characteristic of materials that have an index of refraction which depends on the polarization of the electromagnetic wave passing through it

材料的一种特性，其折射率取决于穿过其的电磁波的偏振

A characteristic of materials that generate a voltage when stressed and that flex when a voltage is applied

材料在受压时产生电压并在施加电压时弯曲的特性

✓ 正确答案

The ability of materials to generate voltage when an electromagnetic wave of a certain frequency is applied

当施加一定频率的电磁波时材料产生电压的能力

#E6D02🔗

What is the equivalent circuit of a quartz crystal?

石英晶体的等效电路是怎样的？

Series RLC in parallel with a shunt C representing electrode and stray capacitance

串联 RLC 与代表电极和杂散电容的并联 C 并联

✓ 正确答案

Parallel RLC, where C is the parallel combination of resonance capacitance of the crystal and electrode and stray capacitance

并联RLC，其中C是晶体和电极的谐振电容与杂散电容的并联组合

Series RLC, where C is the parallel combination of resonance capacitance of the crystal and electrode and stray capacitance

串联RLC，其中C是晶体和电极的谐振电容与杂散电容的并联组合

Parallel RLC, where C is the series combination of resonance capacitance of the crystal and electrode and stray capacitance

并联RLC，其中C是晶体和电极的谐振电容与杂散电容的串联组合

#E6D03🔗

Which of the following is an aspect of the piezoelectric effect?

以下哪一项是压电效应的一个方面？

Mechanical deformation of material due to the application of a voltage

由于施加电压而导致材料发生机械变形

✓ 正确答案

Mechanical deformation of material due to the application of a magnetic field

由于施加磁场而导致材料发生机械变形

Generation of electrical energy in the presence of light

在有光的情况下产生电能

Increased conductivity in the presence of light

有光时电导率增加

#E6D04🔗

Why are cores of inductors and transformers sometimes constructed of thin layers?

为什么电感器和变压器的磁芯有时由薄层构成？

To simplify assembly during manufacturing

简化制造过程中的装配

To reduce power loss from eddy currents in the core

减少铁芯涡流造成的功率损耗

✓ 正确答案

To increase the cutoff frequency by reducing capacitance

通过减小电容来提高截止频率

To save cost by reducing the amount of magnetic material

通过减少磁性材料的用量来节省成本

#E6D05🔗

How do ferrite and powdered iron compare for use in an inductor core?

铁氧体和铁粉在电感器磁芯中的使用效果如何？

Ferrite cores generally have lower initial permeability

铁氧体磁芯通常具有较低的初始磁导率

Ferrite cores generally have better temperature stability

铁氧体磁芯通常具有更好的温度稳定性

Ferrite cores generally require fewer turns to produce a given inductance value

铁氧体磁芯通常需要更少的匝数来产生给定的电感值

✓ 正确答案

Ferrite cores are easier to use with surface-mount technology

铁氧体磁芯更易于通过表面贴装技术使用

#E6D06🔗

What core material property determines the inductance of an inductor?

哪些磁芯材料特性决定了电感器的电感？

Permittivity

介电常数

Resistance

阻力

Reactivity

反应性

Permeability

渗透性

✓ 正确答案

#E6D08🔗

Which of the following materials has the highest temperature stability of its magnetic characteristics?

以下哪种材料的磁特性的温度稳定性最高？

Brass

黄铜

Powdered iron

铁粉

✓ 正确答案

Ferrite

铁氧体

Aluminum

铝

#E6D09🔗

What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of a transistor HF amplifier?

晶体管高频放大器的输入和输出端子上常用哪些器件作为 VHF 和 UHF 寄生抑制器？

Electrolytic capacitors

电解电容

Butterworth filters

巴特沃斯滤波器

Ferrite beads

铁氧体磁珠

✓ 正确答案

Steel-core toroids

钢芯环形线圈

#E6D10🔗

What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?

在电感器中使用环形磁芯代替螺线管磁芯的主要优点是什么？

Toroidal cores confine most of the magnetic field within the core material

环形磁芯将大部分磁场限制在磁芯材料内

✓ 正确答案

Toroidal cores make it easier to couple the magnetic energy into other components

环形磁芯更容易将磁能耦合到其他元件中

Toroidal cores exhibit greater hysteresis

环形磁芯表现出更大的磁滞

Toroidal cores have lower Q characteristics

环形磁芯具有较低的 Q 特性

#E6D11🔗

Which type of core material decreases inductance when inserted into a coil?

哪种类型的磁芯材料插入线圈时会降低电感？

Ceramic

陶瓷

Brass

黄铜

✓ 正确答案

Ferrite

铁氧体

Aluminum

铝

#E6D12🔗

What causes inductor saturation?

电感饱和的原因是什么？

Operation at too high a frequency

操作频率过高

Selecting a core with low permeability

选择低磁导率的磁芯

Operation at excessive magnetic flux

磁通量过大时运行

✓ 正确答案

Selecting a core with excessive permittivity

选择介电常数过高的磁芯

← 上一节: E6C 📑 返回 E6 大纲下一节: E6E →

FCC E6D - 电路元件与半导体

小节 E6D：电路元件与半导体