CBSE Class 12 (Science) Dual Nature of Matter — practice questions
22 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 (Science) Dual Nature of Matter in the app →In a photoelectric experiment, the minimum negative potential applied to the collector plate at which the photThe momentum carried by a photon of wavelength $\lambda$ isThe minimum energy needed to free an electron from a metal is its:Work function is usually measured in:Photoelectric emission was discovered in 1887 by:Below the threshold frequency, photoelectric emission:The maximum photoelectric current at high positive voltage is the:The negative voltage that just stops the current is called the:Photoelectric emission begins after a time lag that is:Who explained the photoelectric effect in 1905?In Einstein's picture, radiation travels as:The number of photoelectrons emitted per second depends on the:The kinetic energy of the photoelectrons is set by the:Increasing the intensity of light leaves the stopping potential:The work function of a surface depends on the:Who proposed that matter also has a wave nature?The waves associated with moving particles are called:The de Broglie relation contains a wave concept together with a:Ultraviolet light causing emission was studied in detail by:However intense the light, no emission occurs below the:Photoelectric current falls to zero at which voltage?The de Broglie wavelength of a fast electron is comparable with: