Physics - Understanding the Relationship with Current

Ampere's law states:

$B=\frac{\mu_0 I}{2\pi r}$ .

In other words, the magnetic field (), is equal to a constant ( $\mu_0$ ) times the current () divided by the circumference of the magnetic field it is creating.

We are given the current, the constant, and the radius. Using these values, we can solve for the magnetic field strength.

$B=\frac{\mu_0 I}{2\pi r}$

$B=\frac{(4\pi*10^{-7}\frac{T\cdot m}{A})( 8.5*10^8A)}{2\pi 1.2m}$

Notice that the $\pi$ cancels out.

$B=\frac{(4*10^{-7}\frac{T\cdot m}{A}) (8.5*10^8A)}{2* 1.2m}$

$B=\frac{340{T\cdot m}}{2.4m}$

Understanding the Relationship with Current

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