19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
If the threshold frequency of a metal for the photoelectric effect is ν₀, which of the following will NOT happen?
The threshold wavelength for the photoelectric effect on sodium is 5000 Å. Its work function is:
Ultraviolet light of 6.2 eV falls on an aluminium surface (work function = 4.2 eV). The kinetic energy (in joule) of the fastest electron emitted is approximately:
The minimum frequency ν₀, below which the photoelectric effect is not observed, is called
The kinetic energy of photoelectrons does NOT depend upon
The photoelectric effect shows:
Increasing the frequency of incident radiation in the photoelectric effect increases the:
In the photoelectric effect, the number of photoelectrons emitted is proportional to:
Einstein's theory of photoelectric effect is based on:
The energy required to break one mole of Cl–Cl bonds in Cl₂ is 242 kJ mol⁻¹. The largest wavelength of light capable of breaking a single Cl–Cl bond is
The energy ratio of photons of wavelength 3000 Å and 6000 Å is
The number of photons emitted in 10 hours by a 60 W sodium lamp (λ = 6000 Å) is approximately
According to Planck, the smallest quantity of energy that can be emitted or absorbed in the form of electromagnetic radiation is called
Which is NOT a characteristic of Planck's quantum theory of radiation?
The relation between energy of radiation and its frequency was given by:
Rank the following radiations from highest energy to lowest: X-ray, ultraviolet, visible, infrared, microwave
Calculate the frequency of yellow radiation having wavelength 5800 Å.
The number of wavelengths per unit length is called
The relationship between frequency (ν), wavelength (λ) and velocity of light (c) is
The correct order of increasing wavelength of electromagnetic radiations is
Rutherford's nuclear model of the atom failed to explain
In the Rutherford scattering experiment, most α-particles passed straight through the gold foil because
The smallest and lightest positive ion obtained from hydrogen is called
The oil drop experiment was developed by
The electrical discharge through gases could be observed only at