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NDA 2024 · PYQ · Oceanography / Tides · medium

Which of the following statements regarding neap tides is/are correct? 1. It occurs every 14 – 15 days, which coincides with the first and third quarter of the Moon. 2. This tide has a small tidal range because the gravitational forces of the Moon and the Sun are in quadrature. Select the answer using the code given below :

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2✓ Correct
  4. D.Neither 1 nor 2

Explanation

Both statements about neap tides are correct. Neap tides occur approximately every 14-15 days, coinciding with the first quarter and third quarter (last quarter) phases of the Moon. During these phases, the Sun and Moon are at right angles (in quadrature, 90°) relative to the Earth, so their gravitational pulls partially cancel each other. This results in a small tidal range with lower high tides and higher low tides compared to spring tides, which occur during full moon and new moon.
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