I\'ve already had this one answered and it was stillwrong. The answer I recieved

Question

I've already had this one answered and it was stillwrong. The answer I recieved was .0048. Pleasehelp!!!
The return stroke of a bolt of lightning typically carries apeak current of 24 kA up from theground. What is the maximum magnetic field associated with the bolt1.2 m away?
I've already had this one answered and it was stillwrong. The answer I recieved was .0048. Pleasehelp!!!
The return stroke of a bolt of lightning typically carries apeak current of 24 kA up from theground. What is the maximum magnetic field associated with the bolt1.2 m away?

Explanation / Answer

Maximum magnetic field associated with the bolt 1.2 m away isB = o i / 2R where o = permeability of free space = 4* 10-7 H / m            i= current = 24000 A           R =distance = 1.2 m substitue values we get B = 4 * 10 -3 T

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