1. What is the fundamental principle of quantum mechanics? A) Wave-particle duality B) Newton’s laws of motion C) General relativity D) Classical electromagnetism Answer: A) Wave-particle duality 2. Which operator represents the total energy of a quantum mechanical system? A) Hamiltonian operator B) Momentum operator C) Position operator D) Angular momentum operator Answer: A) Hamiltonian operator 3. What does the Schrödinger equation describe in quantum mechanics? A) Particle spin B) Wavefunction evolution C) Classical trajectories D) Photon absorption Answer: B) Wavefunction evolution 4. Which phenomenon in quantum mechanics explains the quantization of energy levels in atoms? A) Photoelectric effect B) Compton scattering C) Wave interference D) Quantization of angular momentum Answer: D) Quantization of angular momentum 5. What is the role of Hermitian operators in quantum mechanics? A) They represent physical observables B) They describe wavefunction evolution C) They govern particle spin D) They determine quantum entanglement Answer: A) They represent physical observables 6. Which concept in quantum mechanics states that measurements of physical quantities are represented by eigenvalues? A) Uncertainty principle B) Heisenberg’s principle C) Measurement postulate D) Wave-particle duality Answer: C) Measurement postulate 7. What is the significance of quantum entanglement in quantum mechanics? A) It describes wave-particle duality B) It explains the quantization of energy levels C) It links the properties of entangled particles regardless of distance D) It governs particle spin Answer: C) It links the properties of entangled particles regardless of distance 8. What does the Pauli exclusion principle state in quantum mechanics? A) Energy quantization in atomic systems B) Wave-particle duality of matter C) No two fermions can occupy the same quantum state simultaneously D) Measurement uncertainty of position and momentum Answer: C) No two fermions can occupy the same quantum state simultaneously 9. Which phenomenon in quantum mechanics describes the probability distribution of particles in space and time? A) Quantum tunneling B) Wavefunction collapse C) Probability amplitude D) Quantum interference Answer: C) Probability amplitude 10. What does the concept of superposition imply in quantum mechanics? A) The simultaneous existence of multiple states B) The collapse of wavefunctions C) The quantization of energy levels D) The measurement of physical observables Answer: A) The simultaneous existence of multiple states

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