In the figure shown electromagnetic radiations of wavelength 200 nm are incident on the metallic plate A. The photo electrons are accelerated by a potential difference 10 V. These electrons strike another metal plate B from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is 100 nm. The work function of the metal A is x eV, then the value of x+2.2 is (use hc=12400 eV ∘A)

In the figure shown electromagnetic radiations of wavelength 200 nm ar

1.	In the figure shown electromagnetic radiations of wavelength 200 nm are incident on the metallic plate A. The photo electrons are accelerated by a potential difference 10 V. These electrons strike another metal plate B from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is 100 nm. The work function of the metal A is x eV, then the value of x+2.2 is (use hc=12400 eV ∘A)
Answer» In the figure shown electromagnetic radiations of wavelength $200 nm$ are incident on the metallic plate $A$ . The photo electrons are accelerated by a potential difference $10 V$ . These electrons strike another metal plate $B$ from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is $100 nm$ . The work function of the metal $A$ is $x eV$ , then the value of $x + 2.2$ is (use $h c = 12400 eV \circ A$ )