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 · Internal Structure of The Earthmedium · 45s
What causes Earth's magnetic field?
TopicInternal Structure of The Earth
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.
The movement of conductive molten iron and nickel in the liquid outer core generates electric currents, which produce Earth's magnetic field, protecting the planet from solar radiations.
Final Answer: Option B - Convection currents in liquid outer core