Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2024ChemistryStructure of Atom

Light of wavelength shines on a metal surface with intensity x and the metal emits Y electrons per second of average energy Z . What will happen to Y and Z if x is doubled?

Options

  1. AY will be doubled, Z will become half.
  2. BY will be remains same, Z will be doubled.
  3. CBoth will doubled.
  4. DY will be doubled, Z will remains same.

Correct answer

D. Y will be doubled, Z will remains same.

Step-by-step solution

When intensity is doubled, number of electron emitted per second is also doubled but average energy of photoelectron emitted remains same. Thus, Y will be doubled, Z will remain same.

Practice Structure of Atom on Quantrex Academy →

More from Structure of Atom

The frequency of photon which is emitted during a transition of electron of He ^+ ion from fifth energy level to third energy level will be: 2026Which of the following statement is correct ? 2026The wavelength of a particular electron transition for He ⁺ is 100 nm. The wavelength (in Å ) of H atom for the same transition is 2025The energy of second Bohr orbit of hydrogen atom is -3.4 eV. The energy of the fourth Bohr orbit of the He ⁺ ion will be 2025The work function of Cu is 7.68 10⁻¹⁹ ~J . If photons of wavelength 221 nm are made to strike the surface of the metal, the kinetic energy (in J) of the ejected electrons will be ( 2025In an element with atomic number (Z) 25 , the number of electrons with ( n+l ) value equal to 3 and 4 are x and y respectively. The value of (x+y) is 2025a , b , c , d are electromagnetic radiations. Frequencies of a , b are 3 10¹⁵ ~Hz , 2 10¹⁴ ~Hz , respectively, whereas wavelength of c, d are 400 ~nm , 750 ~nm , respectively. The 2025The number of electrons with magnetic quantum number, m _l=0 in the elements with atomic numbers Z=24 and Z=29 are respectively 2025 Full Structure of Atom list All COMEDK PYQs