long straight wire of radius x carries a steady current I. The current is uniformly distributed across its cross section. Calculate the ratio of the magnetic field at x4 and 8x. a) 4 b) 3 c) 2 d) 1
long straight wire of radius x carries a steady current I. The current is uniformly distributed across its cross section. Calculate the ratio of the magnetic field at x4 and 8x. a) 4 b) 3 c) 2 d) 1
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long straight wire of radius x carries a steady current I. The current is uniformly distributed across its cross section. Calculate the ratio of the magnetic field at x4 and 8x.
a) 4
b) 3
c) 2
d) 1
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