Electrical Measurements MCQ

Test your knowledge with important Electrical Measurements MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Electrical Measurements MCQs at Bissoy

• A galvanometer based recorder works on the principle of ________
  ক

  Van der Wall’s effect

  খ

  D’Arsonval movement

  গ

  Paschen effect

  ঘ

  Azhimuthal quatum number
• How many types of tracing systems are used in graphical representation?
  ক

  two

  খ

  five

  গ

  ten

  ঘ

  one
• Basic elements of a strip chart recorder are ________
  ক

  chalk and board

  খ

  pen and pencil

  গ

  pencil and paper

  ঘ

  pen and chart paper
• In a strip chart recorder ________
  ক

  biological quantity is measured

  খ

  chemical quantity is measured

  গ

  physical quantity is measured

  ঘ

  no quantity is measured
• Efficiency of a recorder is determined using ________
  ক

  paper

  খ

  chart

  গ

  voltmeter

  ঘ

  oscilloscope
• Recorder is a ________
  ক

  measuring instrument

  খ

  voltage source

  গ

  current divider

  ঘ

  musical tool
• How many types of graphic recorders are there?
  ক

  five

  খ

  ten

  গ

  three

  ঘ

  one
• A physical quantity is recorded to preserve the details.
  ক

  True

  খ

  False
• Non-electrical quantities are measured directly.
  ক

  True

  খ

  False
• Electronic recorders are of __________
  ক

  2 types

  খ

  4 types

  গ

  10 types

  ঘ

  15 types
• Reverse leakage current in a transistor _______
  ক

  is affected by light

  খ

  is not affected by light

  গ

  increases with a decrease in pressure

  ঘ

  decreases with increase in temperature
• Response time for gas-filled phototubes is _______
  ক

  zero

  খ

  intermediate

  গ

  fast

  ঘ

  slow
• Optocoupler consists of a phototransistor and a led.
  ক

  True

  খ

  False
• When an open circuited pn junction is illuminated then _________________
  ক

  resistance increases

  খ

  there is no effect

  গ

  electron hole pairs are formed

  ঘ

  capacitance increases
• Photoconductors are made of _______
  ক

  thick layer of semiconductor

  খ

  thin layer of semiconductor

  গ

  capacitive substrate

  ঘ

  inductive substrate
• Phototubes are very quick in response to light.
  ক

  True

  খ

  False
• Commonly used photoemissive material is _______
  ক

  gold

  খ

  opium

  গ

  tellurium

  ঘ

  cesium-antimony
• Photoconductive transducers produce output ________
  ক

  due to change in inductance

  খ

  due to change in light

  গ

  due to change in resistance

  ঘ

  due to change in temperature
• Photoelectric transducers consist of _______
  ক

  1 transducer

  খ

  3 transducers

  গ

  5 transducers

  ঘ

  10 transducers
• Optical radiations involve _________
  ক

  optoelectric devices

  খ

  biological devices

  গ

  mechanical devices

  ঘ

  chemical devices
• A quartz crystal is _________
  ক

  a chemical transducer

  খ

  a photoelectric transducer

  গ

  not a self-generating transducer

  ঘ

  a self-generating transducer
• Microphone converts light into heat.
  ক

  True

  খ

  False
• A piezoelectric transducer is used as an ignition source for a cigarette.
  ক

  True

  খ

  False
• A piezoelectric transducer has a _________
  ক

  very high sensitivity

  খ

  low sensitivity

  গ

  high sensitivity

  ঘ

  zero sensitivity
• In kitchen applications a piezoelectric crystal is used for _________
  ক

  skimming milk

  খ

  lighting a gas stove

  গ

  grinding

  ঘ

  mixing
• When a compressive force is applied to a quartz crystal then ____________
  ক

  positive charges are induced

  খ

  negative charges are induced

  গ

  no charge is induced

  ঘ

  both positive and negative charges are induced
• Piezoelectric transducer consists of _________
  ক

  copper rod

  খ

  aluminum wire

  গ

  gold crystal

  ঘ

  quartz crystal
• Piezoelectric crystals produce _________
  ক

  no voltage

  খ

  low voltage

  গ

  high voltage

  ঘ

  very high voltage
• Piezoelectric crystals __________
  ক

  float on water

  খ

  dissolve in water

  গ

  are not soluble in water

  ঘ

  absorb water
• Piezoelectric transducer is used for measuring __________
  ক

  non-electrical quantities

  খ

  electrical quantities

  গ

  chemical quantities

  ঘ

  any quantity