PHY 205 Quiz

1. What is a photon?

2. How are the electrons distributed in Thomson's model?

3. Why is it necessary for the tube to be in a vacuum during thermionic emission?

4. Which of the following is not quantized?

5. Which of the following statements about electrons within an atom is true?

6. How do the oscillations of the electrical and magnetic components in electromagnetic waves relate to the direction of propagation?

7. What type of radiation can be produced using cathode ray tubes?

8. In electromagnetic waves, how do the electrical and magnetic components oscillate?

9. Arrange the following types of electromagnetic radiation in order of increasing wavelength

10. High beam of cathode ray in vacuum tube can be steered and manipulated by

11. What is the intrinsic angular momentum (spin) value of an electron?

12. Arrange the following types of electromagnetic radiation in order of increasing frequency:

13. What term is used to describe the lowest energy state that an electron can occupy within an atom?

14. In Thomson's model, where are the negatively charged electrons located?

15. Which of the following statements is TRUE?

16. Wavelength is inversely proportional to an object’s mass

17. In quantum mechanics, what role does a photon play in the electromagnetic field?

18. Electrons absorbs energy in form of photons as they are accelerated

19. What happens when a metal wire is heated in a vacuum during thermionic emission?

20. If the dimensions of the nucleus are small enough, what can happen to alpha particles passing very near the nucleus in Rutherford's model?

21. Which field properties does an electron exhibit due to its charge and motion?

22. In Rutherford's model, where is the positive charge concentrated?

23. In Thompson’s experiment, a a beam of electron travelling at 6.8 x 10^7m/s is bent into a circular path of radius 4cm in the magnetic of induction 10^-2 W/m2. Find the specific charge to mass (e/m)

24. According to quantum mechanics, what is the alternate view of electromagnetic radiation (EMR)?

25. What are electromagnetic waves?

26. What type of process is represented by this equation e† + e¯ → ϒ + ϒ

27. What is the primary reason for the scattering of alpha particles in Rutherford's model?

28. What is thermionic emission?

29. Electrons, being fermions, adhere to which principle that prohibits two electrons from occupying the same quantum state?

30. What is the electric charge of a positron?

31. What is the relative mass of an electron compared to a proton?

32. In what devices are cathode ray tubes commonly used?

33. Which branch of physics is concerned with the quantization of energy and its effects on the interaction of matter and energy?

34. What is the significance of alpha particle scattering experiments in Rutherford's model?