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List of top Physics Questions on Modern Physics asked in AP EAPCET
The work function of Mg, Cu, Ag, Li are \(3.7, 4.8, 4.3, 2.5\,\text{eV}\) respectively. A wavelength of \(300\,\text{nm}\) light is shined on them. The metals which undergo photoelectric effect are
AP EAPCET - 2026
AP EAPCET
Physics
Modern Physics
Light of wavelength \(1000\AA\) incidents on a metal surface of work function \(6\,eV\). The maximum kinetic energy of photoelectrons is
AP EAPCET - 2026
AP EAPCET
Physics
Modern Physics
Two identical photo cathodes receive light of frequencies \( f_1 \) and \( f_2 \). If the velocity of photo electrons (of mass m) coming out are respectively \( V_1 \) & \( V_2 \) then:
AP EAPCET - 2026
AP EAPCET
Physics
Modern Physics
Sodium and Copper have work functions 2.3 eV and 4.5 eV respectively. Then the ratio of their threshold wavelengths is nearly:
AP EAPCET - 2026
AP EAPCET
Physics
Modern Physics
Two identical parallel metal plates A and B, having fine holes at their centers are connected to a power supply as shown in the figure. An electron having energy 200 eV is directed to pass through these holes from A to B. The de Broglie wavelength of the electron when it comes out of plate B is:
AP EAPCET - 2026
AP EAPCET
Physics
Modern Physics
Work function of a metallic surface is 5.01 eV. When a light of wavelength 2000Å falls on the metallic surface, it emits photo electrons. The potential difference required to stop the fastest photo electron is? (in Volt)
AP EAPCET - 2026
AP EAPCET
Physics
Modern Physics
The de Broglie wavelength of a particle of mass $m$ moving with a velocity $v$ is given by
AP EAPCET - 2026
AP EAPCET
Physics
Modern Physics
The work function of a metal depends on
AP EAPCET - 2026
AP EAPCET
Physics
Modern Physics
Light of wavelength \(1\ \text{nm}\) belongs to the following class of waves
AP EAPCET - 2022
AP EAPCET
Physics
Modern Physics