Find magnetic flux density at a point on the axis of a long solenoid having 5000 turns/m when it carrying a current of 2 A

Explanation

To find the magnetic flux density (B) at a point on the axis of a long solenoid, we can use the formula:

\[ B = \mu_0 \cdot n \cdot I \]

where:
- \( B \) is the magnetic flux density,
- \( \mu_0 \) is the permeability of free space (\( 4\pi \times 10^{-7} \, \text{T m/A} \)),
- \( n \) is the number of turns per unit length of the solenoid (in turns/m),
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