PHY 205 Quiz

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

2. What is thermionic emission?

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

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

5. 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)

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

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

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

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

3. What is a photon?

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

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

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

7. What are electromagnetic waves?

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

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

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

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

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

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

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

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

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

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

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

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

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

7. Which of the following is not quantized?

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

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

10. What is the electric charge of a positron?

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

12. Which of the following statements is TRUE?

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