Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Earthquakemedium · 45s
What are secondary (S) waves in an earthquake?
TopicEarthquake
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
S-waves are transverse or shear waves that move perpendicular to the wave direction, traveling only through solids and arriving after P-waves. They typically cause more ground shaking and damage than P-waves.
Final Answer: Option B - Shear waves moving slower than P waves