Two points, point a and point b, are situated above a current-carrying wire. point b is located at a distance r from the wire, which is twice as far from the wire as point a. by what factor is the magnetic field at point a larger or smaller than the magnetic field at point b?

Explanation:

It is given that, there are two points situated above a current-carrying wire. Point B is located at a distance R from the wire, which is twice as far from the wire as point A such that,

And

We know that the magnetic field at a distance R is inversely proportional to the distance from wire as :

So, the magnetic field at point A larger than the magnetic field at point B by a factor of 2. Hence, this is the required solution.

it has to be b, about 97 percent.

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