Question
I solved that the current in a long straight wire that would produce a magnetic field twice the strength of the Earth's field at a
I solved that the current in a long straight wire that would produce a magnetic field twice the strength of the Earth's field at a distance of 5 cm from the wire. Earth's field is about 5*10-5 T.
B = 2 * 5 * 10-5 = 1 * 10-4 T
B = mu0 I / 2 pi r
1 * 10-4 = (4 pi * 10-7 * I) / (2 pi * 0.05)
I = ( 1 * 10-4 * 2 pi * 0.05 ) / ( 4 pi * 10-7 )
I = 25 A
I want this example done with different numbers:
Q: The current in a long straight wire that would produce a magnetic field 100 times the strength of the Earth's field at a distance of 1 cm from the wire. Earth's field is about 5*10-5 T.
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