GRE Subject 2026 Practice Test Physics Waves and Oscillations Free Quiz 2

11. What type of waves have oscillations perpendicular to propagation?

A. Longitudinal B. Transverse C. Surface D. Sound

12. What type of waves have oscillations parallel to propagation?

A. Longitudinal B. Transverse C. Surface D. Electromagnetic

13. What is the change in frequency due to relative motion?

A. Interference B. Diffraction C. Polarization D. Doppler effect

14. What is the Doppler effect formula for sound?

A. f' = f(v ± v_s)/(v ∓ v₀) B. f' = f(v ± v₀)/(v ∓ v_s) C. f' = f(v ± v₀)/v D. f' = f(v)/(v ± v_s)

15. What is the superposition of waves?

A. Interference B. Diffraction C. Polarization D. Reflection

16. When does destructive interference occur?

A. In phase B. Partially in phase C. Random D. Out of phase

17. What are points of zero displacement in a standing wave?

A. Nodes B. Antinodes C. Crests D. Troughs

18. What are points of maximum displacement in a standing wave?

A. Nodes B. Crests C. Antinodes D. Troughs

19. What is the wave equation?

A. ∂²y/∂x² = v² ∂²y/∂t² B. ∂²y/∂x² = (1/v²) ∂²y/∂t² C. ∂²y/∂t² = v² ∂²y/∂x² D. ∂²y/∂x² = (1/v²) ∂²y/∂t²

20. What is the energy of a wave proportional to?

A. Amplitude B. Amplitude² C. Frequency D. Wavelength