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ira [324]
3 years ago
9

A very long straight current-carrying wire produces a magnetic field of 25 µT at a distance d from the wire. How far will the ma

gnetic field due to this wire be 2.8 µT.
Physics
1 answer:
daser333 [38]3 years ago
6 0

The magnetic field strength of a very long current-carrying wire is proportional to the inverse of the distance from the wire. The farther you go from the wire, the weaker the magnetic field becomes.

B ∝ 1/d

B = magnetic field strength, d = distance from wire

Calculate the scaling factor for d required to change B from 25μT to 2.8μT:

2.8μT/25μT = 1/k

k = 8.9

You must go to a distance of 8.9d to observe a magnetic field strength of 2.8μT

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