Question

What current must flow in an infinitely long straight wire to give a flux density of 3x10 T at 6 cm from the wire ​

Answer 1

Answer:

Explanation:

HOPE THIS HELPS !!

Answer 2

Given:

Flux density from wire at 6 cm is 3 × 10^(-5) T.

To find:

Current through wire ?

Calculation:

General expression of magnetic field intensity (or flux density) for infinite wires is:

$B = \dfrac{ \mu_{0}i }{2\pi r}$

$\implies B = \dfrac{ \mu_{0}(2i )}{4\pi r}$

$\implies 3 \times {10}^{ - 5} = {10}^{ - 7} \times \dfrac{ 2i }{ \frac{6}{100} }$

$\implies 300 = \dfrac{ 2i }{ \frac{6}{100} }$

$\implies 300 = \dfrac{ 200i }{ 6}$

$\implies i = 9 \: ampere$

So, current through wire is 9 Ampere.