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Modern Physics Test 2 Online MCQs

Test Name Modern Physics Test 2
Subject Physics
Test Type MCQs
Total Question 15
Total Marks 30
Total Time 15 Mints
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Get the knowledge of Modern Physics in the form of multiple choice questions Test for the recruitment test, all admission test, mock quiz, MCAT and engineering test preparation.

Modern Physics Test 2 Online MCQs


1. The energy difference between the first two levels of hydrogen atom is 10.2 eV. For another element of atomic number 10 and mass number 20, this will be


Question 1 of 15

2. A photo cell is illuminated by small bright source placed 1 m away. When the same source of light is placed 2 m away. Which of the following in true about the electrons emitted by the photo cathode?

Question 2 of 15

3. Which of the following characteristics of photoelectric effect supports the particle nature of radiations.


Question 3 of 15

4. The dynamic mass of the photon is given by


Question 4 of 15

5. The momentum of the photon is given by


Question 5 of 15

6. A photo sensitive metal is not emitting photoelectrons when irradiated. It will do so when threshold is crossed. To cross the threshold we need to increase


Question 6 of 15

7. In photoelectric effect, the photoelectric current

Question 7 of 15

8. The study of photoelectric effect is useful in understanding

Question 8 of 15

9. A photosensitive material would emit electrons if excited by photons beyond a threshold. To cross the threshold you would increase


Question 9 of 15

10. In photoelectric effect when photons of energy hv fall on a photosensitive surface (work function hv₀) electrons are emitted from the metallic surface with a kinetic energy. It is possible to say that

Question 10 of 15

11. Photoelectrons are being obtained by irradiating zinc by a radiation of 3100 Å. In order to increase the kinetic energy of ejected photoelectrons


Question 11 of 15

12. Which of the following is not property of the photons?


Question 12 of 15

13. If the ionisation energy for hydrogen atom is 13.6 eV. The energy required to excite it from the ground state to the next higher state is nearly


Question 13 of 15

14. Blue light can cause photoelectric emission from a metal, but yellow light cannot. If red light is incident on the metal, then


Question 14 of 15

15. The maximum energy of the electrons released in photocell is independent of


Question 15 of 15


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