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JEE MAIN 2025
29-01-2025 SHIFT-2
Question
The magnetic field inside a 200 turns solenoid of radius 10 cm is $2.9 \times 10^{-4} \mathrm{Tesla}$. If the solenoid carries a current of 0.29 A , then the length of the solenoid is $\_\_\_\_$ $\pi \mathrm{cm}$.
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