FCC G7A - 实用的电路与原理图

#G7A01🔗

What is the function of a power supply bleeder resistor?

电源泄放电阻的作用是什么？

It acts as a fuse for excess voltage

它充当过电压的保险丝

It discharges the filter capacitors when power is removed

断电时它会对滤波电容器放电

✓ 正确答案

It removes shock hazards from the induction coils

它消除了感应线圈的电击危险

It eliminates ground loop current

它消除了接地环路电流

#G7A02🔗

Which of the following components are used in a power supply filter network?

电源滤波器网络中使用以下哪些元件？

Diodes

二极管

Transformers and transducers

变压器和换能器

Capacitors and inductors

电容器和电感器

✓ 正确答案

All these choices are correct

所有这些选项都是正确的

#G7A03🔗

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

哪种类型的整流电路使用两个二极管和一个中心抽头变压器？

Full-wave

全波

✓ 正确答案

Full-wave bridge

全波电桥

Half-wave

半波

Synchronous

同步

#G7A04🔗

What is characteristic of a half-wave rectifier in a power supply?

电源中的半波整流器有何特点？

Only one diode is required

仅需要一个二极管

✓ 正确答案

The ripple frequency is twice that of a full-wave rectifier

纹波频率是全波整流器的两倍

More current can be drawn from the half-wave rectifier

可以从半波整流器汲取更多电流

The output voltage is two times the peak input voltage

输出电压是峰值输入电压的两倍

#G7A05🔗

What portion of the AC cycle is converted to DC by a half-wave rectifier?

交流周期的哪一部分通过半波整流器转换为直流电？

90 degrees

90度

180 degrees

180度

✓ 正确答案

270 degrees

270度

360 degrees

360度

#G7A06🔗

What portion of the AC cycle is converted to DC by a full-wave rectifier?

全波整流器将交流周期的哪一部分转换为直流？

90 degrees

90度

180 degrees

180度

270 degrees

270度

360 degrees

360度

✓ 正确答案

#G7A07🔗

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

连接到电阻负载的未滤波全波整流器的输出波形是什么？

A series of DC pulses at twice the frequency of the AC input

频率是交流输入频率两倍的一系列直流脉冲

✓ 正确答案

A series of DC pulses at the same frequency as the AC input

一系列与交流输入频率相同的直流脉冲

A sine wave at half the frequency of the AC input

交流输入频率一半的正弦波

A steady DC voltage

稳定的直流电压

#G7A08🔗

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

与线性电源相比，以下哪项是开关模式电源的特性？

Faster switching time makes higher output voltage possible

更快的开关时间使更高的输出电压成为可能

Fewer circuit components are required

需要更少的电路元件

High - frequency operation allows the use of smaller components

高频操作允许使用更小的元件

✓ 正确答案

Inherently more stable

本质上更稳定

#G7A09🔗

Which symbol in figure G7-1 represents a field effect transistor?

图 G7-1中哪个符号代表场效应晶体管？

Symbol 2

符号2

Symbol 5

符号5

Symbol 1

符号1

✓ 正确答案

Symbol 4

符号4

#G7A10🔗

Which symbol in figure G7-1 represents a Zener diode?

图 G7-1 中哪个符号代表齐纳二极管？

Symbol 4

符号4

Symbol 1

符号1

Symbol 11

符号11

Symbol 5

符号5

✓ 正确答案

#G7A11🔗

Which symbol in figure G7-1 represents an NPN junction transistor?

图 G7-1中哪个符号代表NPN结型晶体管？

Symbol 1

符号1

Symbol 2

符号2

✓ 正确答案

Symbol 7

符号7

Symbol 11

符号11

#G7A12🔗

Which symbol in Figure G7-1 represents a solid core transformer?

图 G7-1中哪个符号代表实芯变压器？

Symbol 4

符号4

Symbol 7

符号7

Symbol 6

符号6

✓ 正确答案

Symbol 1

符号1

#G7A13🔗

Which symbol in Figure G7-1 represents a tapped inductor?

图 G7-1 中哪个符号代表抽头电感？

Symbol 7

符号7

✓ 正确答案

Symbol 11

符号11

Symbol 6

符号6

Symbol 1

符号1

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FCC G7A - 实用的电路与原理图

小节 G7A：实用的电路与原理图