Question

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.

Answer 1

magnetic flux density at a point on the axis of a long solenoid is given by

$B={\mu }_{0}ni$

$=4\pi \times {10}^{-7}\times 5000\times 2=0.01256T$