Which one of the following is true in photoel | vedclass

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(B) The correct statement is that the photoelectric current is directly proportional to the intensity of light for a given frequency.$1$. Photoelectri

Vedclass · Accepted Answer

Photoelectric current is directly proportional to the intensity of light of a given frequency at moderate intensities.

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(B) The correct statement is that the photoelectric current is directly proportional to the intensity of light for a given frequency.$1$. Photoelectric current is directly proportional to the number of photoelectrons emitted per second,which in turn is directly proportional to the intensity of incident light.$2$. The maximum kinetic energy $(K.E._{max})$ of photoelectrons is given by Einstein's photoelectric equation: $K.E._{max} = h
u - \phi$,where $h$ is Planck's constant,$
u$ is the frequency of incident light,and $\phi$ is the work function of the metal. Thus,$K.E._{max}$ is directly proportional to the frequency,not inversely.$3$. The threshold frequency is a characteristic property of the metal surface and does not depend on the intensity or wavelength of the incident light.Therefore,option $(B)$ is correct.

Which one of the following is true in photoelectric emission?

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