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Magnetic Fields Produced by Currents

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Scholar
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Date Posted: 7/24/2008 1:50:24 PM  Status: Closed
Magnetic Fields Produced by Currents
Course Textbook Chapter Problem
General Physics N/A N/A N/A
Question Details:
In a lightning bolt, 14 C of charge flows in a time of 1.5 multiplied by 10-3 s. Assuming that the lightning bolt can be represented as a long, straight line of current, what is the magnitude of the magnetic field at a distance of 26 m from the bolt?
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Oracle
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(NIMBLE - the National Institute of Monkey Business and Learning)
Date Posted: 7/24/2008 1:57:23 PM  Status: Live
Asker's Rating: Lifesaver   
Response:
current  =  charge / time  =  14 / 0.0015  =    9333 amps
 
magnetic field  =  μ I / 2π r  =   4π x 10-7 * 9333 / 2 π * 26  =
 
                         =    7.18 x 10-5  Tesla
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