Selected MCQ

Current Question
Which phenomenon proves quantization of charge?
  • A. Photoelectric effect
  • B. Millikan oil drop experiment
  • C. Compton scattering
  • D. Interference
Correct Answer: B
Explanation:
Oil drop experiment measured discrete electron charge.
Related Question 1
Which phenomenon demonstrates quantization of angular momentum?
  • A. Diffraction
  • B. Zeeman effect
  • C. Photoelectric effect
  • D. Reflection
Correct Answer: B
Explanation:
Zeeman splitting arises from quantized angular momentum states.
Related Question 2
Which phenomenon leads to quantization of atomic energy levels?
  • A. Classical mechanics
  • B. Boundary conditions on wavefunctions
  • C. Thermal motion
  • D. Friction
Correct Answer: B
Explanation:
Allowed solutions of Schrödinger equation are discrete due to constraints.
Related Question 3
Which ion has +2 charge?
  • A. Na⁺
  • B. Ca²⁺
  • C. Cl⁻
  • D. O²⁻
Correct Answer: B
Explanation:
Calcium forms +2 cation.
Related Question 4
Which phenomenon is explained by spontaneous symmetry breaking?
  • A. Refraction
  • B. Superconductivity
  • C. Diffusion
  • D. Reflection
Correct Answer: B
Explanation:
Superconductivity arises from broken gauge symmetry.
Related Question 5
Which force acts on charged particles?
  • A. Gravitational
  • B. Magnetic
  • C. Electric
  • D. Nuclear
Correct Answer: C
Explanation:
Electric force acts on charges.