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. I

Question

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. If you were unfortunate enough to be 4.9 m away from such a lightning bolt, how large a magnetic field would you experience

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Tài Đức 2 months 2021-07-31T15:05:14+00:00 2 Answers 1 views 0

Answers ( )

    0
    2021-07-31T15:06:18+00:00

    Answer:

    how large a magnetic field would you experience = 8.16 x 10∧-4T

    Explanation:

    I = 20KA = 20,000A

    r = 4.9 m

    how large a magnetic field would you experience =  u.I/2πr

    how large a magnetic field would you experience = (4π x10∧-7) × 20000/2π × 4.9

    how large a magnetic field would you experience = 8.16 x 10∧-4T

    0
    2021-07-31T15:06:56+00:00

    Answer: 8.16*10^-4 T

    Explanation:

    Given

    Current of the lightening bolt, I = 20 kA

    Distance from the strike of the lightening bolt, r = 4.9 m

    To solve, we use the formula

    B = [μ(0) * I] / 2πr, where

    B = magnetic field of the lightening

    μ = permeability constant = 4π*10^-7 N/A²

    I = current of the lightening

    r = distance from the lightening strike

    B = [(4 * 3.142*10^-7) * 20*10^3] / (2 * 3.142 * 4.9)

    B = (12.568*10^-7 * 20*10^3) / 6.284 * 4.9

    B = 0.025 / 30.79

    B = 8.16*10^-4 T

    The magnetic field to be experienced would be 8.16*10^-4 T large

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