PHY 205 Quiz

1. What is the electric charge of a positron?

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

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

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

5. What is thermionic emission?

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

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

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

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

10. What are electromagnetic waves?

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

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

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

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

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

16. 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)

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

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

19. Which of the following statements is TRUE?

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

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

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

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

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

25. What is a photon?

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

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

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

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

30. Which of the following is not quantized?

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

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

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

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