Test: Dual Behaviour of Matter, Heisenberg Uncertainty Principle - JEE MCQ
15 Questions MCQ Test - Test: Dual Behaviour of Matter, Heisenberg Uncertainty Principle
If a suitable photon is employed to locate an electron (mass = 9.11 × 10−31 kg) in an atom within a distance of 10.98 nm, the uncertainty involved in the measurement of its velocity in ms−1 is
The position of both, an electron and a helium atom is known within 
. Further the momentum of the electron is known within 
. The minimum uncertainty in the measurement of the momentum of the helium atom is
. Further the momentum of the electron is known within . The minimum uncertainty in the measurement of the momentum of the helium atom is
(which is constant).| 1 Crore+ students have signed up on EduRev. Have you? Download the App |
At temperature T, the average kinetic energy of any particle is 
. The de Broglie wavelength follows the order:
. The de Broglie wavelength follows the order:
The de-Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 ms−1 is approximately ____ (Planck's constant h = 6.63 × 10−34 J.s)
i.e., 
If the de-Broglie wavelength of a particle of mass m is 100 times its velocity, then its value in terms of its mass (m) and Planck's constant (h) is
Calculate the velocity of ejected electron from the metal surface when light of frequency 
fall on the metal surface and the threshold frequency is 
for metal ?
Two fast moving particles 
and 
are associated with de Broglie wavelengths 
and 
respectively. If mass of 
is nine times the mass of 
, the ratio of kinetic energies of 
and 
would be
The energy required to remove an electron from the surface of Sodium metal is 
What is the longest wavelength of radiation with which it can show photoelectric effect?
The velocity of particle 
is 
and that of particle 
is 
If the mass of particle 
is five times that of particle 
, then the ratio of deBroglie wavelengths associated with the particles 
and 
is
and 
also,
A light of frequency 
when falls on a metal plate emits electrons that have double the kinetic energy compared to the kinetic energy of emitted electrons when frequency of 
falls on the same plate. The threshold frequency 
of the metal in 
is
The work function (ϕ) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metals is:
there is inverse relation between de Broglie wavelength and momentum, hence the graph will be rectangular hyperbola.If uncertainty in position and velocity are equal then uncertainty in momentum will be
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