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Semiconductor Devices
access_time 2022-12-25T10:27:03.836Z face Sonika Agarwal
Semiconductor Devices Semiconductors are the materials whose conductivity and resistivity lie in between metals and insulators When temperature higher than zero degree Kelvin some of the electrons are excited from valence band to conduction band creating an equal number of holes in the valence band ...
Dual Nature of Radiation and Matter
access_time 2022-12-25T10:19:44.237Z face Sonika Agarwal
Dual Nature of Radiation and Matter Photo Electric Effect The phenomenon of photoelectric effect is discovered by Hertz in 1887 When the light of certain frequency is allowed to fall on a metal surface and electrons are ejected from the metal surface this phenomenon is called photoelectric effect Or...
MCQ Physics - Topic Electromagnetic Wave
access_time 2022-11-18T17:41:09.425Z face Sonika Agarwal
MCQ Physics - Topic Electromagnetic Wave Que 1 The dimensional formula of 1/(magnetic permeability×electric permittivity) a) [LT^-1] b) [L^-1T] c) [L^2T^-2] d) [TL] Ans (c) Que 2 The electromagnetic wave which has least wavelength a) Radio waves b) X rays c) microwaves d) Gamma waves Ans (d) Que 3 T...