AP 10th Class Physics Textbook. We covered all the AP 10th Class Physics Textbook MCQs in this post for free so that you can practice well for the exam.
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AP 10th Class Physics Textbook Objective for Students
The ionization energy of a hydrogen atom is 13.6 eV. According to Bohr’s theory, the energy for a transition between the 3rd and 4th orbits is
a. 1.51 eV
b. 3.40 eV
c. 0.66 eV
d. 2.88 eV
Option c – 0.66 eV
What is the energy of light of wavelength 4500 Å?
a. 3 eV
b. 2.75 eV
c. 2.55 eV
d. 2.32 eV
Option b – 2.75 eV
The work function of a metal is 2.5 eV. If radiation of wavelength 4000 Å falls on it, what will be the energy of emitted photoelectrons?
a. 0.0063 eV
b. 0.0603 eV
c. 0.603 eV
d. 6.3 eV
Option c – 0.603 eV
The longest wavelength that will cause photoelectric emission from a sodium surface is 5830 Å. What is its work function?
a. 2.12 eV
b. 1.21 eV
c. 3.12 eV
d. 2 eV
Option a – 2.12 eV
The work function of a metal is 2.4 eV, and the stopping potential is 1.2 volts. What is the energy of incident photons?
a. 2.6 volts
b. 3.6 volts
c. 1-volt
d. 3 volts
Option b – 3.6 volts
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