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NEET UG Dual Nature of Radiation and Matter — practice questions — page 6

Explore 161 free Dual Nature of Radiation and Matter questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Dual Nature of Radiation and Matter questions and exercises with answers

Showing questions 151–161 of 161.

The maximum photoelectric current at high positive voltage is the:Read the answer and worked solution →The waves associated with moving particles are called:Read the answer and worked solution →Ultraviolet light causing emission was studied in detail by:Read the answer and worked solution →The de Broglie wavelength of a fast electron is comparable with:Read the answer and worked solution →Set by intensity or by frequency?Read the answer and worked solution →The momentum carried by a photon of wavelength $\lambda$ isRead the answer and worked solution →The de Broglie relation contains a wave concept together with a:Read the answer and worked solution →Photoelectric current falls to zero at which voltage?Read the answer and worked solution →Order the photoelectric storyRead the answer and worked solution →The minimum energy needed to free an electron from a metal is its:Read the answer and worked solution →However intense the light, no emission occurs below the:Read the answer and worked solution →

Worked practice questions

The maximum photoelectric current at high positive voltage is the:

  1. Saturation current
  2. Alternating current
  3. Displacement current
  4. Photoelectric wave
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Correct answer: A. Saturation current

1. Raising the collector voltage gathers more electrons. 2. Eventually every emitted electron is collected. 3. The current then levels off at the saturation current. 4. So the answer is saturation current. _Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_

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The waves associated with moving particles are called:

  1. Water waves
  2. Radio waves
  3. Matter waves
  4. Sound waves
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Correct answer: C. Matter waves

1. A moving particle carries a wavelength of its own. 2. That wave belongs to the particle, not to a field. 3. Such waves are called matter waves. 4. So the answer is matter waves. _Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_

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Ultraviolet light causing emission was studied in detail by:

  1. Hallwachs and Lenard
  2. Newton and Hooke
  3. Bohr and Sommerfeld
  4. Curie and Becquerel
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Correct answer: A. Hallwachs and Lenard

1. Hertz noticed the effect but did not pursue it. 2. Two later experimenters studied it through the eighteen nineties. 3. They were Hallwachs and Lenard. 4. So the answer is Hallwachs and Lenard. _Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_

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