FCC G6A - 电路元件 | Zq.Lucifer.Wall

#G6A01🔗

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

标准 12 伏铅酸电池达到最大使用寿命的最低允许放电电压是多少？

6 volts

6伏

8.5 volts

8.5伏

10 .5 volts

10 .5 伏

✓ 正确答案

12 volts

12伏

#G6A02🔗

What is an advantage of batteries with low internal resistance?

内阻低的电池有什么优点？

Long life

寿命长

High discharge current

高放电电流

✓ 正确答案

High voltage

高电压

Rapid recharge

快速充值

#G6A03🔗

What is the approximate forward threshold voltage of a germanium diode?

锗二极管的正向阈值电压大约是多少？

0.1 volt

0.1伏

0. 3 volts

0. 3 伏

✓ 正确答案

0.7 volts

0.7伏

1.0 volts

1.0伏

#G6A04🔗

Which of the following is characteristic of an electrolytic capacitor?

以下哪项是电解电容器的特性？

Tight tolerance

严格的公差

Much less leakage than any other type

比任何其他类型的泄漏少得多

High capacitance for a given volume

给定体积下的高电容

✓ 正确答案

Inexpensive RF capacitor

廉价的射频电容器

#G6A05🔗

What is the approximate forward threshold voltage of a silicon junction diode?

硅结二极管的正向阈值电压大约是多少？

0.1 volt

0.1伏

0.3 volts

0.3伏

0. 7 volts

0. 7 伏

✓ 正确答案

1.0 volts

1.0伏

#G6A06🔗

Why should wire-wound resistors not be used in RF circuits?

为什么射频电路中不宜使用绕线电阻？

The resistor’s tolerance value would not be adequate

电阻的容差值不够

The resistor’s inductance could make circuit performance unpredictable

电阻器的电感可能会使电路性能变得不可预测

✓ 正确答案

The resistor could overheat

电阻器可能会过热

The resistor’s internal capacitance would detune the circuit

电阻器的内部电容会使电路失谐

#G6A07🔗

What are the operating points for a bipolar transistor used as a switch?

用作开关的双极晶体管的工作点是什么？

Saturation and cutoff

饱和度和截止

✓ 正确答案

The active region (between cutoff and saturation)

活动区域（截止和饱和之间）

Peak and valley current points

峰谷电流点

Enhancement and depletion modes

增强和耗尽模式

#G6A08🔗

Which of the following is characteristic of low voltage ceramic capacitors?

低压陶瓷电容器有以下哪些特点？

Tight tolerance

严格的公差

High stability

高稳定性

High capacitance for given volume

给定体积下的高电容

Comparatively low cost

成本相对较低

✓ 正确答案

#G6A09🔗

Which of the following describes MOSFET construction?

以下哪项描述了 MOSFET 的结构？

The gate is formed by a back-biased junction

栅极由反向偏置结形成

The gate is separated from the channel by a thin insulating layer

栅极与沟道通过薄绝缘层隔开

✓ 正确答案

The source is separated from the drain by a thin insulating layer

源极与漏极通过薄绝缘层隔开

The source is formed by depositing metal on silicon

源极是通过在硅上沉积金属而形成的

#G6A10🔗

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

真空管的哪个元件调节阴极和板之间的电子流？

Control grid

控制网格

✓ 正确答案

Suppressor grid

抑制栅

Screen grid

屏幕网格

Trigger electrode

触发电极

#G6A11🔗

What happens when an inductor is operated above its self-resonant frequency?

当电感器在其自谐振频率之上工作时会发生什么？

Its reactance increases

其电抗增大

Harmonics are generated

产生谐波

It becomes capacitive

变成电容性的

✓ 正确答案

Catastrophic failure is likely

可能会发生灾难性的失败

#G6A12🔗

What is the primary purpose of a screen grid in a vacuum tube?

真空管中屏栅的主要用途是什么？

To reduce grid-to-plate capacitance

减少栅板电容

✓ 正确答案

To increase efficiency

提高效率

To increase the control grid resistance

增大控制栅极电阻

To decrease plate resistance

降低极板电阻

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FCC G6A - 电路元件

小节 G6A：电路元件