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In photoelectric effect the work function of ametal is 3.5 eV. The emitted electrons can bestopped by applying a potential of –1.2 V. Then[1994]
  • a)
    the energy of the incident photon is 4.7 eV
  • b)
    the energy of the incident photon is 2.3 eV
  • c)
    if higher frequency photon be used, thephotoelectric current will rise
  • d)
    when the energy of photon is 3.5 eV, thephotoelectric current will be maximum
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In photoelectric effect the work function of ametal is 3.5 eV. The emi...
hv = W0 + Ek = 3.5 + 1.2 = 4.7 eV
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Most Upvoted Answer
In photoelectric effect the work function of ametal is 3.5 eV. The emi...
Since stopping potential is the negative potential applied to stop the electrons, so as per the formula,
Total energy associated =
work function + maximum kinetic energy
= 3.5 ev+ 1.2 ev = 4.7 ev

since maximum kinetic energy =
stopping potential * electronic charge
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In photoelectric effect the work function of ametal is 3.5 eV. The emitted electrons can bestopped by applying a potential of –1.2 V. Then[1994]a)the energy of the incident photon is 4.7 eVb)the energy of the incident photon is 2.3 eVc)if higher frequency photon be used, thephotoelectric current will rised)when the energy of photon is 3.5 eV, thephotoelectric current will be maximumCorrect answer is option 'A'. Can you explain this answer?
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In photoelectric effect the work function of ametal is 3.5 eV. The emitted electrons can bestopped by applying a potential of –1.2 V. Then[1994]a)the energy of the incident photon is 4.7 eVb)the energy of the incident photon is 2.3 eVc)if higher frequency photon be used, thephotoelectric current will rised)when the energy of photon is 3.5 eV, thephotoelectric current will be maximumCorrect answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about In photoelectric effect the work function of ametal is 3.5 eV. The emitted electrons can bestopped by applying a potential of –1.2 V. Then[1994]a)the energy of the incident photon is 4.7 eVb)the energy of the incident photon is 2.3 eVc)if higher frequency photon be used, thephotoelectric current will rised)when the energy of photon is 3.5 eV, thephotoelectric current will be maximumCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In photoelectric effect the work function of ametal is 3.5 eV. The emitted electrons can bestopped by applying a potential of –1.2 V. Then[1994]a)the energy of the incident photon is 4.7 eVb)the energy of the incident photon is 2.3 eVc)if higher frequency photon be used, thephotoelectric current will rised)when the energy of photon is 3.5 eV, thephotoelectric current will be maximumCorrect answer is option 'A'. Can you explain this answer?.
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