(C) $1$. The saturation photoelectric current is directly proportional to the intensity of the incident radiation. Since the intensity is reduced,the

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(C) $1$. The saturation photoelectric current is directly proportional to the intensity of the incident radiation. Since the intensity is reduced,the saturation current for the new situation must be lower than the original (broken line) graph.$2$. The stopping potential is directly proportional to the frequency of the incident radiation. Since the frequency is increased,the magnitude of the stopping potential must increase (i.e.,it becomes more negative).$3$. Comparing the given options,graph $C$ shows a lower saturation current and a higher magnitude of stopping potential compared to the broken line graph. Therefore,graph $C$ represents the new situation.

Class 12 Physics Dual Nature of Radiation and matter Einstein's Photoelectric Equation and Energy Quantum of Radiation

Medium

$A$ photoelectric cell is connected to a source of variable potential difference and the resulting photoelectric current $(\mu A)$ is plotted against the applied potential difference $(V)$. The graph with the broken line represents one situation for a given frequency and intensity of the incident radiation. If the frequency is increased and intensity is reduced,which of the following graphs of unbroken line represents the new situation?

A
$A$
B
$B$
C
$C$
D
$D$

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Class 12

Physics Questions

Chapter

Dual Nature of Radiation and matter

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Einstein's Photoelectric Equation and Energy Quantum of Radiation

The work functions for metals $A$, $B$, and $C$ are $1.92 eV$, $2.0 eV$, and $5 eV$ respectively. The metal(s) which will emit photoelectrons for incident radiation of wavelength $4100 Å$ is/are $[h=6.63 \times 10^{-34} J s, e=1.6 \times 10^{-19} C, c=3 \times 10^8 m/s]$.

EasyMHT CET 2022

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Light of energy $E$ falls normally on a metal of work function $\frac{E}{3}$. The kinetic energies $K$ of the photoelectrons are

EasyKCET 2024

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When radiation of wavelength $\lambda$ is incident on a metallic surface,the stopping potential is $4.8 \ V$. If the same surface is illuminated with radiation of double the wavelength,then the stopping potential becomes $1.6 \ V$. Then the threshold wavelength for the surface is

DifficultJEE MAIN 2021

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Electrons ejected from the surface of a metal,when light of a certain frequency is incident on it,are stopped fully by a retarding potential of $3 \ V$. The photoelectric effect on this metallic surface begins at a frequency of $6 \times 10^{14} \ s^{-1}$. The frequency of the incident light in $s^{-1}$ is: [Planck's constant $= 6.4 \times 10^{-34} \ J \cdot s$,charge on the electron $= 1.6 \times 10^{-19} \ C$]

DifficultTS EAMCET 2004

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When light is incident on a surface, photoelectrons are emitted. For photoelectrons:

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The work functions for metals $A$, $B$, and $C$ are $1.92 eV$, $2.0 eV$, and $5 eV$ respectively. The metal(s) which will emit photoelectrons for incident radiation of wavelength $4100 Å$ is/are $[h=6.63 \times 10^{-34} J s, e=1.6 \times 10^{-19} C, c=3 \times 10^8 m/s]$.

Light of energy $E$ falls normally on a metal of work function $\frac{E}{3}$. The kinetic energies $K$ of the photoelectrons are

When radiation of wavelength $\lambda$ is incident on a metallic surface,the stopping potential is $4.8 \ V$. If the same surface is illuminated with radiation of double the wavelength,then the stopping potential becomes $1.6 \ V$. Then the threshold wavelength for the surface is

When light is incident on a surface, photoelectrons are emitted. For photoelectrons:

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