Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Atoms and Nuclei question

2015 · Shift 1 · Q50
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Advanced
  3. /Physics
  4. /Atoms and Nuclei
  5. /2015 · Shift 1 · Q50

Atoms and Nuclei question

2015 · Shift 1 · Q50

JEE AdvancedPhysicsAtoms and NucleiNumerical+4 / −1
Consider a hydrogen atom with its electron in the nth orbital. An electromagnetic radiation of wavelength 90 nm is used to ionize the atom. If the kinetic energy of the ejected electron is 10.4 eV, then the value of n is (hc = 1242 eV nm)
Numerical answer
PreviousNext

More from Atoms and Nuclei

  • A nuclear power plant supplying electrical power to a village uses a radioactive material of half life T years as the fuel. The amount of fuel at the beginning is such that the total power requirement of the village is 12.5 % of the…2015 · Numerical
  • Match the nuclear processes given in Column I with the appropriate option(s) in Column II: Includes diagram2015 · MCQ
  • For a radioactive material, its activity A and rate of change of its activity R are defined as A=−dtdN​ and R=−dtdA​, where N(t) is the number of nuclei at time t. Two radioactive source P(mean life…2015 · Numerical
  • A fission reaction is given by 92236​U→54140​Xe+3894​Sr+x+y, where x and y are two particles. Considering 92236​U to be at rest, the kinetic energies of the products are denoted by KXe​,KSr​,Kx​(2MeV)…2015 · Multiple correct
  • If λ Cu is the wavelength of K α X-ray line of copper (atomic number 29) and λ Mo is the wavelength of the K α X-ray line of molybdenum (atomic number 42), then the ratio λ Cu/λ Mo is close to2014 · MCQ
  • A freshly prepared sample of a radioisotope of half-life 1386 s has activity 103 disintegrations per second. Given that ln2 = 0.693, the fraction of the initial number of nuclei (expressed in nearest integer percentage) that will decay in…2013 · Numerical
  • The radius of the orbit of an electron in a hydrogen-like atom is 4.5a0, where a0 is the Bohr radius. Its orbital angular momentum is 2π3h​. It is given that h is Planck constant and R is Rydberg constant. The possible…2013 · Multiple correct
  • The mass of a nucleus ZA​X is less than the sum of the masses of (A-Z) number of neutrons and Z number of protons in the nucleus. The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus.… Includes table2013 · MCQ