17 JEE Main 2019 Dual Nature of Matter previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2019 previous-year questions from the Dual Nature of Matter chapter of Physics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Dual Nature of Matter chapter hub.
In a photoelectric effect experiment, the threshold wavelength of light is   380   n m . If the wavelength of…
Light is incident normally on a completely absorbing surface with an energy flux of   25   W   c m - 2 .…
If the deBroglie wavelength of an electron is equal to 10⁻ times the wavelength of a photon of frequency 6 × 10¹⁴ Hz, t…
When a certain photosensitive surface is illuminated with a monochromatic light of frequency ν , the stopping pote…
A nucleus A , with a finite de-broglie wavelength λ A , undergoes spontaneous fission into two nuclei B and C of e…
A 2   m W laser operates at a wavelength of   500   n m . The number of photons that will be emitted per…
In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To…
The stopping potential V o (in volt) as a function of frequency ( v ) for a sodium emitter, is shown in the figure. The…
The magnetic field associated with a light wave is given, at the origin, by B = B 0 sin 3.14 × 10 7 c t + sin 6.28…
A particle ' P ' is formed due to a completely inelastic collision of particles ' x ' and ' y ' having de-Broglie wavel…
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