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Standard XII
Physics
NCERT
Question

According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photoelectrons from a metal Vs the frequency, of the incident radiation gives a straight line whose slope:
  1. Depends on the nature of the metal used
  2. Depends both on the intensity of the radiation and the metal used
  3. Depends on the intensity of the radiation
  4. Is the same for all metals and independent of the intensity of the radiation

A
Depends on the nature of the metal used
B
Depends on the intensity of the radiation
C
Depends both on the intensity of the radiation and the metal used
D
Is the same for all metals and independent of the intensity of the radiation
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Solution
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According to Einstein's photoelectric equation,

hν=W0+KE

⟹KE=hν−W0

Comparing with y=mx+c

Slope=m=h

which is Plank's constant, same for all metals and independent of intensity of radiation.

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