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NDA 2 2025 GAT, question 117

Topic: Geography

Q117

Consider the following statements with reference to sea waves :

  1. The height of waves is determined by wind speed, wind duration, and fetch

  2. The energy of a wave is proportional to the square of its height

  3. Waves retain most of their energy as they travel across the deep ocean

Which of the statements given above is/are correct ?

  1. (a) 1 only
  2. (b) 1 and 2 only
  3. (c) 2 and 3 only
  4. (d) 1, 2 and 3Correct answer

Solution.

Answer: (d) 1, 2 and 3

  1. Wind speed, duration and fetch, the distance wind blows across water, affect wave growth.
  2. For ordinary linear waves, energy per unit area is proportional to wave height squared.
  3. Waves can carry much of this energy across deep water before strong coastal dissipation.
  4. All three statements are correct in this standard description.