Lightning bolts can carry currents up to approximately 20 ka. we can model such a current as the equivalent of a very long, straight wire. part a if you were unfortunate enough to be 5.0 m away from such a lightning bolt, how large a magnetic field would you experience

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Nigel Hughes

Physics

23 July, 18:42

Lightning bolts can carry currents up to approximately 20 ka. we can model such a current as the equivalent of a very long, straight wire. part a if you were unfortunate enough to be 5.0 m away from such a lightning bolt, how large a magnetic field would you experience

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Jacqueline Montgomery · Answer 1

B (Magnetic) = (u x I) / (2 (pi) x r) pi = 3.141592654 u (permeability of free space) = 4pi x 10 ^ (-7) (Tesla*meters/Amp) r = 5 meters I = 20000 kA B = (u x I) / (2 (pi) x r) = (4pi x 10 ^ (-7) x 20000) / (10pi) = 8 x 10^-4 Tesla = 800 microTeslas