Electromagnetic Spectrum MCQ

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

• Which organization regulates international EM spectrum division?
  ক

  ITU

  খ

  FCC

  গ

  NTIA

  ঘ

  WCC
• Higher frequencies can have more channels for a particular bandwidth.
  ক

  True

  খ

  False
• What is the upper frequency of a signal with a bandwidth of 6Mhz, if the lower frequency limit is 54Mhz?
  ক

  60Mhz

  খ

  48Mhz

  গ

  60Hz

  ঘ

  48Hz
• What is the bandwidth of a signal having 928Mhz and 902Mhz as its upper and lower frequencies?
  ক

  26Mhz

  খ

  26Hz

  গ

  1830Hz

  ঘ

  1830Mhz
• The portion of the electromagnetic spectrum occupied by a signal is called ________
  ক

  Signal spectrum

  খ

  Bandwidth

  গ

  Frequency width

  ঘ

  Signal strength
• Which one of the following is not a reason for not using X-rays in communication?
  ক

  Highly attenuated

  খ

  High power is required

  গ

  Stopped by ionizing effects

  ঘ

  Ionizing radiation
• Which one of the following is not a source of infrared radiation?
  ক

  Human bodies

  খ

  Light bulbs

  গ

  Sun

  ঘ

  Books
• SHF Em waves are used in?
  ক

  Ground to ground communication

  খ

  Satellite communication

  গ

  Aircraft to ATC communication

  ঘ

  Underwater communication
• The maximum peaks of an electromagnetic wave are separated by a distance of 8 in. What is the frequency?
  ক

  256.4Khz

  খ

  1477.8Khz

  গ

  1477.8Mhz

  ঘ

  256.7Mhz
• A signal travels a distance of 75 ft in the time it takes to complete 1 cycle. What is its frequency? 1 m 5 3.28 ft
  ক

  13Mhz

  খ

  13.12Mhz

  গ

  14Mhz

  ঘ

  Cannot be determined
• What is the frequency of the EM wave with a wavelength of 12cm?
  ক

  2.4Ghz

  খ

  2.5Ghz

  গ

  250 Mhz

  ঘ

  0.25Mhz
• What is the wavelength of a signal with a frequency of 150Mhz?
  ক

  10m

  খ

  2m

  গ

  5m

  ঘ

  20m
• The distance that the wave travels in one cycle is called as?
  ক

  Displacement

  খ

  Wavelength

  গ

  Cycle length

  ঘ

  Cycle amplitude
• The range of electromagnetic signals encompassing all frequencies is referred to as?
  ক

  EM waves

  খ

  EM frequency

  গ

  EM spectrum

  ঘ

  EM radiation
• Cps is the unit of what?
  ক

  Frequency

  খ

  Amplitude

  গ

  Phase

  ঘ

  Gain
• The formula of energy produced from the body can be given as _________
  ক

  Q = h- c / λ

  খ

  Q = h*c * λ

  গ

  Q = h+ c / λ

  ঘ

  Q = h*c / λ
• EM waves varies from ______ to ________
  ক

  Meters to nano-meters

  খ

  Meters to micro-meters

  গ

  Nano to micro-meters

  ঘ

  Centimeters to nano-meters
• How much wave length is reflected back by the earth surface from the absorbed sun radiation?
  ক

  0.5meter

  খ

  0.5 micrometer

  গ

  0.5 centimeter

  ঘ

  0.5 decimeter
• Which of the following indicates the correct set of combination in radio waves?
  ক

  Shorter wavelength – high frequency

  খ

  Longer wavelength – less frequency

  গ

  Shorter wavelength – less frequency

  ঘ

  Longer wavelength – high frequency
• Which of the following waves can be used in case of remote sensing?
  ক

  UV rays

  খ

  X-rays

  গ

  Gamma rays

  ঘ

  Visible rays
• Gamma rays are having a wavelength of _________
  ক

  Zero

  খ

  Greater than 0.03nm

  গ

  Less than 0.03nm

  ঘ

  Equal to 0.03nm
• Radio waves are having the longest wavelength among all the electromagnetic waves.
  ক

  False

  খ

  True
• Optical mechanical scanner is used in which type of electromagnetic waves?
  ক

  X-rays

  খ

  Cosmic waves

  গ

  Radio waves

  ঘ

  Thermal IR
• Which among the following wave is not employed in case of remote sensing?
  ক

  X-ray

  খ

  Visible ray

  গ

  Thermal IR

  ঘ

  Radio waves
• Which among the following is having more wavelengths?
  ক

  X-rays

  খ

  Cosmic waves

  গ

  Radio waves

  ঘ

  Gamma rays
• Energy of the discrete particles can be given by_______
  ক

  Photons

  খ

  Protoplasm

  গ

  Electrons

  ঘ

  Neutrons
• Which of the following cannot travel in vacuum?
  ক

  Radio waves

  খ

  Gamma Waves

  গ

  Infrared Waves

  ঘ

  Infrasonic waves
• Pick out the correct increasing order of energy of electromagnetic waves from the following.
  ক

  Einfrared < Emicro < Evisible < Eultraviolet gamma

  খ

  Emicro < Einfrared < Evisible < Eultraviolet < Egamma

  গ

  Emicro < Einfrared < Evisible < Egamma < Eultraviolet

  ঘ

  Emicro < Einfrared < Eultraviolet < Evisible < Egamma
• The speeds of microwaves, infrared waves, and ultraviolet waves are Vm, Vi, and Vu respectively. Identify the correct combination showing the different waves in vacuum.
  ক

  Vm > Vi > Vu

  খ

  Vm = Vi = Vu

  গ

  Vm < Vi < Vu

  ঘ

  Vm > Vi < Vu
• Which is the frequency range of gamma rays from the following?
  ক

  1 × 1018 to 3 × 1022 Hz

  খ

  3 × 10-18 to 5 × 1022 Hz

  গ

  3 × 1018 to 5 × 1022 Hz

  ঘ

  3 × 10-18 to 5 × 10-22 Hz