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 · MagnetismPYQ · 45s
The work done in moving a charge in a magnetic field is: 156
TopicMagnetism
Question Typemultiple choice
DifficultyPYQ
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Magnetic force is perpendicular to velocity ⇒ no work done.
164
Final Answer: Option A — Zero
159