The Lightning Rod's Safety Zone · AI Generator #GEN-5682F551

Physics · electromagnetism

Problem

A cylindrical lightning rod of height h=15  mh = 15\;\text{m} and radius r=2.0  cmr = 2.0\;\text{cm} is struck by lightning, causing a current of I=30,000  AI = 30,000\;\text{A} to flow down through it for a brief moment. A metal detector placed on the ground at distance d=8.0  md = 8.0\;\text{m} from the base of the rod detects this current due to the magnetic field it creates. Calculate the magnetic field strength at the location of the metal detector. Treat the lightning rod as a long straight wire and assume the detector is much closer to the rod than the rod is tall.

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