Question

   A 5cm long solenoid has 1500 turns of wire and carries a current of 7 A. Calculate the magnetic field at the center of the solenoid. 

Answer 1

We have given that,

$L = 5cm = 0.05m$

$N = 1500$

$I = 7A$ ,

The magnetic field at the centre of the solenoid.

$B = \dfrac{\mu_0NI}{L}$

$= \dfrac{4 \times \pi \times10^{-7} \times 1500 \times 7}{0.05}$

$=$ $2637600 \times 10^{-7}T$