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Karnataka PUC II Electromagnetic Waves — practice questions — page 4

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 91–116 of 116.

Electromagnetic waves are produced by charges that are:Read the answer and worked solution →Infrared waves are also referred to as:Read the answer and worked solution →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 →Gamma rays are produced in which kind of process?Read the answer and worked solution →True or false about EM wavesRead the answer and worked solution →The total current in the Ampere Maxwell law is conduction current plus:Read the answer and worked solution →Name the radiationRead the answer and worked solution →X-rays are emitted from atoms that are:Read the answer and worked solution →Match the band to its useRead the answer and worked solution →Complete the Maxwell ruleRead the answer and worked solution →NEET · Physics · EM Spectrum — Increasing FrequencyRead the answer and worked solution →Electromagnetic waves bingoRead the answer and worked solution →Whose set of equations predicted electromagnetic waves?Read the answer and worked solution →The extra term Maxwell added to Ampere's law is the:Read the answer and worked solution →Spot the odd one outRead the answer and worked solution →When unpolarized light passes through a single ideal polarizer, the transmitted intensity is:Read the answer and worked solution →**Malus' law** gives the transmitted intensity through a second polarizer as:Read the answer and worked solution →

Worked practice questions

Electromagnetic waves are produced by charges that are:

  1. Uncharged
  2. Neutralised
  3. Accelerated
  4. Motionless
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Correct answer: C. Accelerated

1. A charge sitting still gives only a static field. 2. A charge moving steadily gives a steady magnetic field. 3. Only accelerated charges radiate electromagnetic waves. 4. So the answer is accelerated. _Source: syllabus Physics, Ch 8 'Electromagnetic Waves'_

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Infrared waves are also referred to as:

  1. Heat waves
  2. Sound waves
  3. Radio waves
  4. Long waves
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Correct answer: A. Heat waves

1. Infrared is produced by hot bodies and molecules. 2. Its main effect on matter is to warm it. 3. So infrared waves are called heat waves. 4. The answer is heat waves. _Source: syllabus Physics, Ch 8 'Electromagnetic Waves'_

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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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More Physics topics

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