PHY 205 Quiz

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

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

3. What is thermionic emission?

4. 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)

5. What is the electric charge of a positron?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

24. What is a photon?

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

26. Which of the following is not quantized?

27. Which of the following statements is TRUE?

28. What are electromagnetic waves?

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

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

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

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

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

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