Questions With Answers For Semiconductors

Question File Number 11



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  • The basic semiconductor amplifying device is a:
    • diode
    • transistor
    • pn-junction
    • silicon gate
    • ========= Answer is b =========
  • Zener diodes are normally used as:
    • RF detectors
    • AF detectors
    • current regulators
    • voltage regulators
    • ========= Answer is d =========
  • The voltage drop across a germanium signal diode when conducting is about:
    • 0.3V
    • 0.6V
    • 0.7V
    • 1.3V
    • ========= Answer is a =========
  • A bipolar transistor has three terminals named:
    • base, emitter and drain
    • collector, base and source
    • emitter, base and collector
    • drain, source and gate
    • ========= Answer is c =========
  • The three leads from a PNP transistor are named the:
    • collector, source, drain
    • gate, source, drain
    • drain, base, source
    • collector, emitter, base
    • ========= Answer is d =========
  • 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:
    • amplification
    • detection
    • modulation
    • rectification
    • ========= Answer is a =========
  • The type of rectifier diode in almost exclusive use in power supplies is:
    • lithium
    • germanium
    • silicon
    • copper-oxide
    • ========= Answer is c =========
  • One important application for diodes is recovering information from transmitted signals. This is referred to as:
    • biasing
    • rejuvenation
    • ionisation
    • demodulation
    • ========= Answer is d =========
  • In a forward biased pn junction, the electrons:
    • flow from p to n
    • flow from n to p
    • remain in the n region
    • remain in the p region
    • ========= Answer is b =========
  • The following material is considered to be a semiconductor:
    • copper
    • sulphur
    • silicon
    • tantalum
    • ========= Answer is c =========
  • A varactor diode acts like a variable:
    • resistance
    • voltage regulator
    • capacitance
    • inductance
    • ========= Answer is c =========
  • A semiconductor is said to be doped when small quantities of the following are added:
    • electrons
    • protons
    • ions
    • impurities
    • ========= Answer is d =========
  • The connections to a semiconductor diode are known as:
    • cathode and drain
    • anode and cathode
    • gate and source
    • collector and base
    • ========= Answer is b =========
  • Bipolar transistors usually have:
    • 4 connecting leads
    • 3 connecting leads
    • 2 connecting leads
    • 1 connecting lead
    • ========= Answer is b =========
  • A semiconductor is described as a "general purpose audio NPN device". This is a:
    • triode
    • silicon diode
    • bipolar transistor
    • field effect transistor
    • ========= Answer is c =========
  • Two basic types of bipolar transistors are:
    • p-channel and n-channel types
    • NPN and PNP types
    • diode and triode types
    • varicap and zener types
    • ========= Answer is b =========
  • A transistor can be destroyed in a circuit by:
    • excessive light
    • excessive heat
    • saturation
    • cut-off
    • ========= Answer is b =========
  • To bias a transistor to cut-off, the base must be:
    • at the collector potential
    • at the emitter potential
    • mid-way between collector and emitter potentials
    • mid-way between the collector and the supply potentials
    • ========= Answer is b =========
  • Two basic types of field effect transistors are:
    • n-channel and p-channel
    • NPN and PNP
    • germanium and silicon
    • inductive and capacitive
    • ========= Answer is a =========
  • A semiconductor with leads labelled gate, drain and source, is best described as a:
    • bipolar transistor
    • silicon diode
    • gated transistor
    • field-effect transistor
    • ========= Answer is d =========

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Compiled Sun Nov 28 2010 at 8:43:30pm


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