Physics Previous Year Question Paper Class 12 Karnataka State Board. We covered all the Physics Previous Year Objective Question Paper Class 12 Karnataka State MCQs in this post for free so that you can practice well for the exam.
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Physics Previous Year Objective Question Paper Class 12 Karnataka State Board for Students
Photoelectric current can be increased by using:
a. Higher frequency radiation
b. Higher intensity radiation
c. Higher work function metal plates
d. The higher area of the plate
Option b – Higher intensity radiation
In the neutron discovery experiment, the Beryllium element is bombarded by:
a. Proton
b. Electron
c. Positron
d. α-Particle
Option d – α-Particle
Photons of energy 2.0 eV fall on a metal plate and release photoelectrons with a maximum velocity of V. By decreasing λ by 25%, the maximum velocity of photoelectrons is doubled. The work function of the metal of the material plate in eV is nearly:
a. 2.22
b. 1.985
c. 2.35
d. 1.80
Option d – 1.80
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