Login or Register for FREE!
Login or Register for FREE!
Subel. ZLB
20 questions
Subelement ZLB

Basic Electrical Theory

Section ZLB11

Semiconductors

The basic semiconductor amplifying device is a

  • diode
  • Correct Answer
    transistor
  • pn-junction
  • silicon gate
This question does not yet have an explanation! Register to add one

Tags: none

Zener diodes are normally used as

  • RF detectors
  • AF detectors
  • current regulators
  • Correct Answer
    voltage regulators
This question does not yet have an explanation! Register to add one

Tags: none

The voltage drop across a germanium signal diode when conducting is about

  • Correct Answer
    0.3V
  • 0.6V
  • 0.7V
  • 1.3V
This question does not yet have an explanation! Register to add one

Tags: none

A bipolar transistor has three terminals named

  • base, emitter and drain
  • collector, base and source
  • Correct Answer
    emitter, base and collector
  • drain, source and gate
This question does not yet have an explanation! Register to add one

Tags: none

The three leads from a PNP transistor are named the

  • collector, source, drain
  • gate, source, drain
  • drain, base, source
  • Correct Answer
    collector, emitter, base
This question does not yet have an explanation! Register to add one

Tags: none

A low-level signal is applied to a transistor circuit input and a higher-level signal is present at the output. This effect is known as

  • Correct Answer
    amplification
  • detection
  • modulation
  • rectification
This question does not yet have an explanation! Register to add one

Tags: none

The type of rectifier diode in almost exclusive use in power supplies is

  • lithium
  • germanium
  • Correct Answer
    silicon
  • copper-oxide
This question does not yet have an explanation! Register to add one

Tags: none

One important application for diodes is recovering information from transmitted signals. This is referred to as

  • biasing
  • rejuvenation
  • ionisation
  • Correct Answer
    demodulation
This question does not yet have an explanation! Register to add one

Tags: none

In a forward biased pn junction, the electrons

  • flow from p to n
  • Correct Answer
    flow from n to p
  • remain in the n region
  • remain in the p region
This question does not yet have an explanation! Register to add one

Tags: none

The following material is considered to be a semiconductor

  • copper
  • sulphur
  • Correct Answer
    silicon
  • tantalum
This question does not yet have an explanation! Register to add one

Tags: none

A varactor diode acts like a variable

  • resistor
  • voltage regulator
  • Correct Answer
    capacitor
  • inductor
This question does not yet have an explanation! Register to add one

Tags: none

A semiconductor is said to be doped when small quantities of the following are added

  • electrons
  • protons
  • ions
  • Correct Answer
    impurities
This question does not yet have an explanation! Register to add one

Tags: none

The connections to a semiconductor diode are known as

  • cathode and drain
  • Correct Answer
    anode and cathode
  • gate and source
  • collector and base
This question does not yet have an explanation! Register to add one

Tags: none

Bipolar transistors usually have

  • 4 connecting leads
  • Correct Answer
    3 connecting leads
  • 2 connecting leads
  • 1 connecting lead
This question does not yet have an explanation! Register to add one

Tags: none

A semiconductor is described as a "general purpose audio NPN device". This is a

  • triode
  • silicon diode
  • Correct Answer
    bipolar transistor
  • field effect transistor
This question does not yet have an explanation! Register to add one

Tags: none

Two basic types of bipolar transistors are

  • p-channel and n-channel types
  • Correct Answer
    NPN and PNP types
  • diode and triode types
  • varicap and zener types
This question does not yet have an explanation! Register to add one

Tags: none

A transistor can be destroyed in a circuit by

  • excessive light
  • Correct Answer
    excessive heat
  • saturation
  • cut-off
This question does not yet have an explanation! Register to add one

Tags: none

To bias a transistor to cut-off, the base must be

  • at the collector potential
  • Correct Answer
    at the emitter potential
  • mid-way between collector and emitter potentials
  • mid-way between the collector and the supply potentials
This question does not yet have an explanation! Register to add one

Tags: none

Two basic types of field effect transistors are

  • Correct Answer
    n-channel and p-channel
  • NPN and PNP
  • germanium and silicon
  • inductive and capacitive
This question does not yet have an explanation! Register to add one

Tags: none

A semiconductor with leads labelled gate, drain and source, is best described as a

  • bipolar transistor
  • silicon diode
  • gated transistor
  • Correct Answer
    field-effect transistor
This question does not yet have an explanation! Register to add one

Tags: none

Go to ZLB10 Go to ZLB12
HamStudy.org™ is copyright 2024 Signal Stuff™, All rights reserved.
View Privacy Policy    |    Get help with HamStudy.org™