Selected MCQ

Current Question
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 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 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 3
Which symmetry leads to conservation of energy (Noether’s theorem)?
  • A. Spatial symmetry
  • B. Time translation symmetry
  • C. Rotational symmetry
  • D. Gauge symmetry
Correct Answer: B
Explanation:
Invariance under time translation implies energy conservation.
Related Question 4
Which energy source is sustainable?
  • A. Coal
  • B. Oil
  • C. Solar
  • D. Gas
Correct Answer: C
Explanation:
Solar is sustainable.
Related Question 5
Which energy is motion?
  • A. Potential
  • B. Thermal
  • C. Kinetic
  • D. Chemical
Correct Answer: C
Explanation:
Motion defines kinetic energy.