Question

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

Answer 1

Here, n = 5000 turns/m, I = 2A, B = ?

We know, 

B = μ₀nI

B = 4π x 10^{- 7} x 5000 x 2

B = 4 x 3.14 x 10^-7 x 1000 T

B = 12.56 x 10^-3 T

B = 0.001256 T