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WorksheetsDUAL NATURE OF RADIATION AND MATTER
Total questions: 10
Worksheet time: 5mins
Photoelectric effect phenomenon was discovered by:
Newton
Maxwell
Hertz
Huygens
Hallwachs experiment set-up is used to study:
Tyndal effect
Diffraction of light
Photo electric effect
Raman effect
Photoelectric current is ………. proportional to the number of photoelectrons emitted per second.
inversely
directly
first directly and then inversely
none of these
The stopping potential depends upon the ....……….. of the fastest electron.
velocity
charge
mass
density
For a given frequency of the incident radiation, the stopping potential …..…….... of its intensity.
is directly proportional
is inversely proportional
is independent
None of these
Photoelectric emission is a/an …………………. process.
slow
fast
instantaneous
very slow
The maximum kinetic energy of the photoelectrons is ….......... proportional to the frequency of incident radiation.
inversely
directly
first directly and then inversely
none of these
According to the quantum theory, light is emitted in the form discrete bundles of energy called ……………..
waves
corpuscles
photons
mesons
The energy spent in releasing the photoelectrons from a metal surface is called ……………
kinetic energy
potential energy
work function
excitation energy
A photon of frequency ν is incident on a metal surface of threshold frequency νο. The kinetic energy of the emitted photoelectron is:
h (𝜈– 𝜈ο )
h𝜈
h𝜈ο
h (𝜈 + 𝜈ο )
