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Worksheetsdual nature of matter and radiation
Total questions: 10
Worksheet time: 5mins
The theory, on the basis of Photoelectric effect can be explained
corpuscular theory
electromagnetic theory
wave theory
quantum theory
The work function of a metal surface is 4.14eV. The cut off wavelength of this metal is
4125 Ao
2062.5Ao
3000 Ao
6000 Ao
Name the phenomenon which shows the quantum nature of electromagnetic radiation.
photoelectric effect
diffraction
polarisation
all the above
A photosensitive surface emits photoelectrons when red light falls on it. Will the surface emit photoelectrons when blue light is incident on it ?
yes
no
Two metals A ,B have work functions 2 eV and 4 eV respectively. Which metal has lower threshold wavelength for photoelectric effect?
A
B
de-Broglie associated with an electron accelerated through a potential difference V is λ. What will be its wavelength when the accelerating potential is increased to 4V?
λ
λ/2
2λ
12.27 λ
If the frequency of the incident light on a metal surface is doubled, will the kinetic energy of the photoelectrons be doubled?
yes
no
Electrons are emitted from a photosensitive surface when it is illuminated by green light but electron emission does not take place by yellow light. Will the electrons be emitted when the surface is illuminated by red light
yes
no
An electron and a proton have same kinetic energy. Which of the two has a greater wavelength?
electron
proton
both have same wavelength
electron volt is a unit of
potential
momentum
energy
charge
