JEE Exam  >  JEE Questions  >  When photons of energy 4.25 eV strike the sur... Start Learning for Free
When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)
a) the work function of A is 7.43 eV.
b) the work function of B is 4.20 eV.
c) TA = 2.00 eV
d) TB = 2.75 eV
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
When photons of energy 4.25 eV strike the surface of a metal A, the ej...

This question is part of UPSC exam. View all JEE courses
Most Upvoted Answer
When photons of energy 4.25 eV strike the surface of a metal A, the ej...
Explanation:


Given,


Photon energy for metal A, EA = 4.25 eV


Maximum kinetic energy of photoelectrons from metal A, TA


De Broglie wavelength of photoelectrons from metal A, λA


Photon energy for metal B, EB = 4.70 eV


Maximum kinetic energy of photoelectrons from metal B, TB = TA - 1.50 eV


De Broglie wavelength of photoelectrons from metal B, λB = 2λA


Let the work function of metal A be ΦA and that of metal B be ΦB.




Solution:


We know that the maximum kinetic energy of photoelectrons is given by the equation:


TA = EA - ΦA


Substituting the values given, we get:


TA = 4.25 - ΦA


Similarly, for metal B,


TB = EB - ΦB = (TA - 1.50) - ΦB


Substituting the value of TA from the previous equation, we get:


TB = 2.75 - ΦA - ΦB


We also know that the de Broglie wavelength of photoelectrons is given by the equation:


λ = h/p, where h is Planck's constant and p is the momentum of the photoelectron.


Since the energy of the photon is given, we can find the momentum of the photoelectron using the equation:


E = p2/2m + Φ, where m is the mass of the electron and Φ is the work function.


Solving for p, we get:


p = √(2m(E - Φ))


Substituting the values given for metal A, we get:


λA = h/√(2m(TA - ΦA))


For metal B, we have:


λB = h/√(2m(TB - ΦB))


Substituting the value of TB from the previous equation, we get:


λB = h/√(2m(2.75 - ΦA - ΦB))


Since λB = 2λ
Explore Courses for JEE exam

Similar JEE Doubts

When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer?
Question Description
When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer?.
Solutions for When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
Here you can find the meaning of When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy TA eV and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB = (TA - 1.50) eV. If the de Broglie wavelength of these photoelectrons is λB = 2λA, then select the correct statement (s)a)the work function of A is 7.43 eV.b)the work function of B is 4.20 eV.c)TA = 2.00 eVd)TB = 2.75 eVCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice JEE tests.
Explore Courses for JEE exam

Top Courses for JEE

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev