Selected MCQ

Current Question
In plasma physics, Debye length represents:
  • A. Particle velocity
  • B. Screening distance of electric fields
  • C. Temperature gradient
  • D. Magnetic field strength
Correct Answer: B
Explanation:
Debye length defines electrostatic screening scale.
Related Question 1
The Compton wavelength is inversely proportional to:
  • A. Charge
  • B. Mass
  • C. Velocity
  • D. Frequency
Correct Answer: B
Explanation:
(\lambda = h/mc), inversely dependent on mass.
Related Question 2
Which radiation has shortest wavelength?
  • A. Radio
  • B. Microwave
  • C. X-ray
  • D. Gamma ray
Correct Answer: D
Explanation:
Gamma rays have highest frequency and shortest wavelength.
Related Question 3
The Hamiltonian of a system represents:
  • A. Total potential energy
  • B. Total kinetic energy
  • C. Total energy of the system
  • D. Only internal energy
Correct Answer: C
Explanation:
Hamiltonian corresponds to total energy in many systems.
Related Question 4
Which phenomenon cannot be explained by classical physics?
  • A. Reflection
  • B. Refraction
  • C. Blackbody radiation spectrum
  • D. Sound waves
Correct Answer: C
Explanation:
Classical theory fails to explain ultraviolet catastrophe.
Related Question 5
Which immune cells differentiate into plasma cells that secrete antibodies?
  • A. T helper cells
  • B. Cytotoxic T cells
  • C. B lymphocytes
  • D. Macrophages
Correct Answer: C
Explanation:
Activated B cells become antibody-producing plasma cells.