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 · MagnetismModerate · 45s
In a solenoid, if the number of turns is doubled and the current halved, the magnetic field inside will: 112
TopicMagnetism
Question Typemultiple choice
DifficultyModerate
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
B ∝ NI ⇒ Doubling N and halving I keeps NI constant.
120
Final Answer: Option A - Remain same
115