PHY 205 Quiz

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

2. Which of the following statements is TRUE?

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

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

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

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

7. What is thermionic emission?

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

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

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

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

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

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

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

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

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

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

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

19. 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)

20. What is a photon?

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

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

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

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

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

26. What are electromagnetic waves?

27. Which of the following is not quantized?

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

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

30. What is the electric charge of a positron?

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

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

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

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