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Karnataka PUC II Dual Nature of Radiation and Matter — practice questions — page 3

Explore 98 free Dual Nature of Radiation and Matter questions in Karnataka PUC II 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 61–90 of 98.

True or false about photoemissionRead the answer and worked solution →Set by intensity or by frequency?Read the answer and worked solution →Order the photoelectric storyRead the answer and worked solution →Complete the photoelectric ruleRead the answer and worked solution →Name the physicistRead the answer and worked solution →Dual nature numbersRead the answer and worked solution →Dual nature bingoRead the answer and worked solution →Who proposed that matter also has a wave nature?Read the answer and worked solution →In a photoelectric experiment, the minimum negative potential applied to the collector plate at which the photocurrent just drops to zero is called theRead the answer and worked solution →Name the physicistRead the answer and worked solution →True or false about photoemissionRead the answer and worked solution →Dual nature bingoRead the answer and worked solution →Complete the photoelectric ruleRead the answer and worked solution →NEET · Physics · Photoelectric — Spot the ErrorRead the answer and worked solution →Work function is usually measured in:Read the answer and worked solution →Photoelectric emission was discovered in 1887 by:Read the answer and worked solution →Below the threshold frequency, photoelectric emission:Read the answer and worked solution →Who explained the photoelectric effect in 1905?Read the answer and worked solution →In Einstein's picture, radiation travels as:Read the answer and worked solution →The number of photoelectrons emitted per second depends on the:Read the answer and worked solution →The kinetic energy of the photoelectrons is set by the:Read the answer and worked solution →Increasing the intensity of light leaves the stopping potential:Read the answer and worked solution →The work function of a surface depends on the:Read the answer and worked solution →Dual nature numbersRead the answer and worked solution →Match the photoelectric termRead the answer and worked solution →The negative voltage that just stops the current is called the:Read the answer and worked solution →Photoelectric emission begins after a time lag that is:Read the answer and worked solution →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 →

Worked practice questions

True or false about photoemission

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Questions
  1. Statement is true
    Yes
    Statement
    Emission begins with no measurable time lag.
  2. Statement is true
    No
    Statement
    Very intense light works below the threshold.
  3. Statement is true
    Yes
    Statement
    Stopping potential does not depend on intensity.
  4. Statement is true
    No
    Statement
    Brighter light makes each electron come out faster.
  5. Statement is true
    Yes
    Statement
    Work function depends on the metal used.
Instructions
Decide whether each statement is true or false.
_Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_

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Set by intensity or by frequency?

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Left
Intensity
Items
  1. Item
    Photon count
    Answer
    Intensity
  2. Item
    Saturation current
    Answer
    Intensity
  3. Item
    Electrons per sec
    Answer
    Intensity
  4. Item
    Energy per photon
    Answer
    Frequency
  5. Item
    Stopping potential
    Answer
    Frequency
  6. Item
    Emission or not
    Answer
    Frequency
Right
Frequency
Instructions
Swipe left for intensity, right for frequency.
_Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_

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Order the photoelectric story

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Steps
  1. A photon reaches metal
  2. Electron absorbs it all
  3. Work function is paid
  4. Rest becomes kinetic
  5. Electron leaves surface
Instructions
Tap the steps in the order they happen.
_Source: syllabus Physics, Ch 11 'Dual Nature of Radiation and Matter'_

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