GRE Subject 2026 Practice Test Physics Solid State Physics Free Quiz 2

11. What technique is used to determine crystal structure?

A. Electron diffraction B. Neutron diffraction C. Optical microscopy D. XRD

12. What is a lattice in Fourier space?

A. Reciprocal lattice B. Direct lattice C. Bravais lattice D. Crystal lattice

13. Where are Brillouin zones located?

A. Direct lattice B. Crystal lattice C. Reciprocal lattice D. Bravais lattice

14. What is the energy difference between the valence and conduction bands?

A. Fermi energy B. Band gap C. Work function D. Ionization energy

15. What materials have overlapping or very small band gaps?

A. Conductors B. Insulators C. Semiconductors D. Superconductors

16. What materials have large band gaps?

A. Conductors B. Semiconductors C. Insulators D. Superconductors

17. What materials have moderate band gaps?

A. Conductors B. Insulators C. Superconductors D. Semiconductors

18. What type of semiconductor has excess holes?

A. N-type B. Intrinsic C. P-type D. Compensated

19. What is the production of a voltage across a conductor in a magnetic field?

A. Seebeck effect B. Peltier effect C. Thomson effect D. Hall effect

20. What is the phenomenon of zero electrical resistance?

A. High conductivity B. Zero resistance C. Low resistance D. Normal conductivity