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Electromagnetic Waves

Quiz by sara

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10 questions
Show answers
  • Q1
    Define electromagnetic waves
    are waves that are created as a result of vibrations caused by magnetic field.
    are waves that are created as a result of vibrations between an electric force and a magnetic force.
    are waves that are created as a result of vibrations caused by electric field .
    are waves that are created as a result of vibrations between an electric field and a magnetic field.
    30s
  • Q2
    uses of microwaves
    medical imaging
    all of the above
    cellular phones
    cancer treatment
    20s
  • Q3
    How does the speed at which electromagnetic waves propagate through different materials vary?
    equals to the wave’s speed in a vacuum
    none of the above
    always more than the wave’s speed in a vacuum
    always less than the wave’s speed in a vacuum
    30s
  • Q4
    Which of the following correctly lists electromagnetic waves in order from longest to shortest wavelength?
    television, infrared, visible light, X-rays
    microwaves, ultraviolet, visible light, gamma rays
    radio waves, infrared, gamma rays, ultraviolet
    gamma rays, ultraviolet, infrared, microwaves
    30s
  • Q5
    Define electromagnetic spectrum
    The range of frequencies and wavelengths that make up all forms of electromagnetic radiation
    waves that are created as a result of vibrations between an electric field and a magnetic field
    The range of frequencies and wavelengths that make up no forms of electromagnetic radiation
    30s
  • Q6
    When does quarts crystals deform?
    When velocity applied across them
    When a potential difference is applied across them.
    30s
  • Q7
    The size of the resonant cavity determine the frequency of Oscillation?
    False
    True
    30s
  • Q8
    Waves with how much frequencies are produced using a resonant cavity?
    Less then 100HMZ
    greater than100HMZ
    greater than 400HMZ
    Less than 400HMZ
    30s
  • Q9
    The ———————of the resonant cavity determines the frequency of Oscillation
    Color
    Size
    Shape
    volume
    10s
  • Q10
    The accelesatiom is largest when the antenna is opposite to the direction of the wave's electric field
    False
    True
    10s

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