Question

a current of 4.0 amperes is flowing in long straight wire.find the intensity of magnetic field at a distance of 5.0 cm from the wire​

Answer 1

The intensity of magnetic field at a distance of 5 cm or 0.05 m from the wire​ is $1.6\times 10^{-5}\ T$.

Explanation:

It is given that,

Current in the long straight wire, I = 4 A

Let B is the intensity of magnetic field at a distance of 5 cm or 0.05 m from the wire​. It is given by using Ampere's circuital law as :

$B=\dfrac{\mu_oI}{2\pi r}$

$B=\dfrac{4\pi \times 10^{-7}\times 4}{2\pi \times 0.05}$

$B=1.6\times 10^{-5}\ T$

So, the intensity of magnetic field at a distance of 5 cm or 0.05 m from the wire​ is $1.6\times 10^{-5}\ T$. Hence, this is the required solution.

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