⚡Chapter Practice
Modern Physics — JEE Practice
45 practice questions across 3 topics. Filter by difficulty, solve topic-wise MCQs, and review detailed solutions.
3 Topics45 Questions
Photoelectric Effect & Dual Nature(15 Qs)
easy (5)
medium (5)
Q1A photon of wavelength 400 nm has energy:Q2The de Broglie wavelength of an electron accelerated through V volts is:Q3If the intensity of light is doubled (keeping frequency same), the photoelectric current:Q4The work function of a metal is 2 eV. The threshold wavelength is:Q5Davisson-Germer experiment confirmed:
hard (5)
Q1An electron and a proton have the same kinetic energy. The ratio of their de Broglie wavelengths is:Q2The momentum of a photon of wavelength λ is:Q3In Compton scattering, the change in wavelength at 90° scattering is:Q4The photoelectric effect has a saturation current because:Q5If the de Broglie wavelength of a particle equals its Compton wavelength, its velocity is:
Atoms & Nuclei(15 Qs)
easy (5)
medium (5)
hard (5)
Q1The ratio of the shortest wavelengths of Lyman and Balmer series is:Q2In nuclear fission of U-235, the energy released per fission is approximately:Q3The Q-value of a nuclear reaction is:Q4In the Bohr model, the angular momentum of electron in the nth orbit is:Q5The activity of a radioactive sample of N atoms (decay constant λ) is:
Semiconductor Devices(15 Qs)
easy (5)
medium (5)
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