Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Dual Nature of Radiation and Matter question

2019 · Q155
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Dual Nature of Radiation and Matter
  5. /2019 · Q155

Dual Nature of Radiation and Matter question

2019 · Q155

NEETPhysicsDual Nature of Radiation and MatterMCQ+4 / −1
An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is (nearly) : (me = 9 ×\times× 10–31 kg)
  1. A
    12.2 × 10–12 m
  2. B
    12.2 × 10–13 m
  3. C
    12.2 × 10–14 m
  4. D
    12.2 nm
View written solutionFree

Correct answer: A

Expression for an electron accelerated through a potential V is given as

λ\lambda λ = 12.27VAo{{12.27} \over {\sqrt V }}\mathop A\limits^o V​12.27​Ao​

= 12.27×10−1010000{{12.27 \times {{10}^{ - 10}}} \over {\sqrt {10000} }}10000​12.27×10−10​

= 12.2 × 10–12 m

PreviousNext

More from Dual Nature of Radiation and Matter

  • An electron of mass m with an initial velocity v=v0​i (v0 > 0) enters an electric field E=−E0​i (E0 = constant > 0) at t = 0. If λ0 is its…2018 · MCQ
  • When the light of frequency 2υ0​ (where υ0​ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v1 . When the frequency of the incident radiation is increased to 5υ0​…2018 · MCQ
  • The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (kelvin) and mass m, is2017 · MCQ
  • The photoelectric threshold wavelength of silver is 3250 × 10−10 m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 × 10−10 m is {Given h = 4.14 × 10−15 eV…2017 · Multiple correct
  • When a metallic surface is illuminated with radiation of wavelength λ, the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2 λ, the stopping potential is 4V​. The…2016 · MCQ
  • An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is2016 · MCQ
  • Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube. The cutoff wavelength (λ0) of the emitted X-ray is2016 · MCQ
  • Photons with energy 5 eV are incifent on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of energy 6 eV are incident on C, no photoelectrons will reach the anode A, if the stopping…2016 · MCQ