PHY 205 Quiz

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

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

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

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

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

6. 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)

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

8. What are electromagnetic waves?

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

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

11. Which of the following is not quantized?

12. What is a photon?

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

14. What is thermionic emission?

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

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

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

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

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

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

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

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

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

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

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

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

27. Which of the following statements is TRUE?

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

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

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

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

32. What is the electric charge of a positron?

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

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