The magnetic field produced by a current in a long straight wire varies with respect to the radial distance r from the wire as Group of answer choices 1/r2. 1/r3. 1/r. r2. r.

1/r

Explanation:

The magnetic field produced by a current in a wire decreases with distance from the wire, this means the magnetic field produced by a currents is inversely proportional to it's distance from the wire.

Let E be magnetic field and r distance of wire

We have that,

E is inversely proportional to r

(E)×(1/r)

need to see circuit to get time constant

answer///scientific method;