Question

What current in a solenoid 15-cm long wound with 100 turns would produce a magnetic field equal to that of the Earth, 5 cross times 10 to the power of negative 5 end exponentT ?

Answer 1

The value is
`I= 0.0597\ A`

Step-by-step explanation:

From the question we are told that

The length of the solenoid is
`l = 15 \ cm = 0.15 \ m`

The number of turns is
`N = 100`

The magnetic field of the earth is
`B = 5* 10^(-5) \ T`

Gnerally magnetic field is mathematically represented as

`B = (\mu_o * N * I )/( l )`

=>
`I= (Bl)/( \mu_o *N )`

=>
`I= ( 5 *10^(-5) * 0.15)/(4\pi *10^(-7) *100 )`

=>
`I= 0.0597\ A`