Polytechnic Physics Syllabus. We covered all the Polytechnic Physics Syllabus MCQs in this post for free so that you can practice well for the exam.
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Polytechnic Physics Syllabus Objective for Students
The threshold wavelength is 2000A. The work function is:
a. 6.35 eV
b. 6.2 eV
c. 6.2 MeV
d. 6.2 KeV
Option b – 6.2 eV
X-rays are streams of:
a. Electrons
b. Protons
c. Photons
d. Phonons
Option c – Photons
Which of the wavelengths is in the infrared region?
a. 5460A°
b. 5893Aº
c. 4320A°
d. 7000A°
Option d – 7000A°
The photoelectric threshold wavelength of a certain metal is 3000A°. If the radiation of 2000A is incident on the metal:
a. Electrons will not be emitted
b. Electrons will be emitted
c. Positrons will be emitted
d. Protons will be emitted
Option b – Electrons will be emitted
The wavelength of X-rays is of the order of:
a. 1 m
b. 1 cm
c. 1 micron
d. 1 Angstrom
Option d – 1 Angstrom
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