Selected MCQ

Current Question
Which particle has zero rest mass?
  • A. Electron
  • B. Proton
  • C. Photon
  • D. Neutron
Correct Answer: C
Explanation:
Photons are massless.
Related Question 1
In a Fermi gas at absolute zero, particles occupy:
  • A. Random energy levels
  • B. Only highest energy level
  • C. All states up to Fermi energy
  • D. Only ground state
Correct Answer: C
Explanation:
Fermions fill all states up to the Fermi level due to Pauli exclusion.
Related Question 2
Which force acts on charged particles?
  • A. Gravitational
  • B. Magnetic
  • C. Electric
  • D. Nuclear
Correct Answer: C
Explanation:
Electric force acts on charges.
Related Question 3
Which particle experiences all four fundamental forces?
  • A. Electron
  • B. Proton
  • C. Neutrino
  • D. Photon
Correct Answer: B
Explanation:
Proton interacts via strong, weak, EM, and gravity.
Related Question 4
Which particle is neutral?
  • A. Proton
  • B. Electron
  • C. Neutron
  • D. Positron
Correct Answer: C
Explanation:
Neutron has no charge.
Related Question 5
Which principle states particles are indistinguishable?
  • A. Pauli principle
  • B. Superposition principle
  • C. Indistinguishability principle
  • D. Correspondence principle
Correct Answer: C
Explanation:
Quantum particles of same type are identical.