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Karnataka PUC II Electromagnetic Waves — practice questions — page 3

Explore 116 free Electromagnetic Waves questions in Karnataka PUC II Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Electromagnetic Waves questions and exercises with answers

Showing questions 61–90 of 116.

Radar systems used in aircraft navigation use:Read the answer and worked solution →Most ultraviolet radiation from the Sun is absorbed in the:Read the answer and worked solution →In an electromagnetic wave, E and B are:Read the answer and worked solution →Electromagnetic waves travel at which speed in free space?Read the answer and worked solution →Maxwell's calculation showed that light is:Read the answer and worked solution →Radio waves are produced by accelerated charges in:Read the answer and worked solution →Which radiation is trapped by carbon dioxide and water vapour?Read the answer and worked solution →Household TV remote switches work using:Read the answer and worked solution →X-rays are produced by bombarding a metal target with:Read the answer and worked solution →The generalised form of Ampere's law is known as the:Read the answer and worked solution →The total current in the Ampere Maxwell law is conduction current plus:Read the answer and worked solution →Gamma rays are produced in which kind of process?Read the answer and worked solution →X-rays are emitted from atoms that are:Read the answer and worked solution →Compared with visible light, infrared waves have frequencies that are:Read the answer and worked solution →Which band is used as a diagnostic tool in medicine?Read the answer and worked solution →Match the band to its useRead the answer and worked solution →True or false about EM wavesRead the answer and worked solution →Sort the radiation by sourceRead the answer and worked solution →Order the spectrum by frequencyRead the answer and worked solution →Complete the Maxwell ruleRead the answer and worked solution →Name the radiationRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Electromagnetic waves bingoRead the answer and worked solution →Which band is used as a diagnostic tool in medicine?Read the answer and worked solution →Compared with visible light, infrared waves have frequencies that are:Read the answer and worked solution →Who first demonstrated electromagnetic waves experimentally?Read the answer and worked solution →Sort the radiation by sourceRead the answer and worked solution →NEET · Physics · EM Spectrum — Order by FrequencyRead the answer and worked solution →Order the spectrum by frequencyRead the answer and worked solution →The speed of an EM wave in vacuum equals:Read the answer and worked solution →

Worked practice questions

Radar systems used in aircraft navigation use:

  1. X-radiation
  2. Microwaves
  3. Gamma rays
  4. Ultraviolet
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Correct answer: B. Microwaves

1. Radar needs a wave that travels well through air. 2. It also needs a short enough wavelength to be directed. 3. Microwaves suit radar systems. 4. So the answer is microwaves. _Source: syllabus Physics, Ch 8 'Electromagnetic Waves'_

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Most ultraviolet radiation from the Sun is absorbed in the:

  1. Metal crust
  2. Inner core
  3. Ozone layer
  4. Ocean water
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Correct answer: C. Ozone layer

1. Ultraviolet is harmful in large doses. 2. A layer high in the atmosphere screens it. 3. That is the ozone layer. 4. So the answer is ozone layer. _Source: syllabus Physics, Ch 8 'Electromagnetic Waves'_

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In an electromagnetic wave, E and B are:

  1. Anti parallel
  2. Coincident
  3. Stationary
  4. Perpendicular
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Correct answer: D. Perpendicular

1. The two fields oscillate together as the wave travels. 2. Neither lies along the direction of travel. 3. E and B are perpendicular to each other and to that direction. 4. So the answer is perpendicular. _Source: syllabus Physics, Ch 8 'Electromagnetic Waves'_

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