Question

A solenoid of length 1.5 cm and 4 cm in diameter processes 10 turns per metre. A current of 5A is flowing through it. The magnetic induction at a point inside the solenoid along the axis is __________ (${\mu }_0=4\pi \times {10}^{-7}$ Wb/A.m)

Answer 1

Magnetic field at the axis inside of the solenoid

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

here,

$n=10turns/m$

$i=5A$

$4\pi \times {10}^{-7}Wb/A.m$

$B=4\pi \times {10}^{-7}\times 10\times 5$

$B=2\pi \times {10}^{-5}T$