Question:
A solenoid of 2.5 m length and 2.0 cm diameter possesses 10 turns per cm. A current of 0.5 A is flowing through it. The magnetic induction at axis inside the solenoid is:
A solenoid of 2.5 m length and 2.0 cm diameter possesses 10 turns per cm. A current of 0.5 A is flowing through it. The magnetic induction at axis inside the solenoid is:
Show Hint
Magnetic field inside a long solenoid: $B = \mu₀ n I$.
Updated On: Apr 16, 2026
- $2π×10^-4T$
- $2π×10^-5T$
- $2π×10^-6T$
- $2π×10^-7T$
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: $n = 10$ turns/cm $= 1000$ turns/m. $B = \mu₀ n I = 4π × 10^-7 × 1000 × 0.5 = 2π × 10^-4$ T.
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