Answer to Question #290246 in Electric Circuits for boshra

Question

Find the magnetic field produced by the solenoid if the number of loops is 400

       and current passing through it is 5A. (Length of the solenoid is 40cm).

Answer 1

We know that

$B=\mu_0ni$

$n=\frac{N}{l}=\frac{400}{0.40}=1000$

N=400

L=0.40m

i=5A

Put value in equation

$$B=4\times3.14\times10^{-7}\times1000\times5=6.28\times10^{-3}T$$

$B=6.28\times10^{-3}T$