A long straight conductor carries a current of

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A long straight conductor carries a current of 10 A10\,\text{A}. Calculate the magnitude of the magnetic field at a point 5.0 cm5.0\,\text{cm} from the wire. (μ0=4π×10−7 H m−1)(\mu_0 = 4\pi\times10^{-7}\,\text{H\,m}^{-1}) (a) 2×10−5 T2\times10^{-5}\,\text{T} (b) 4×10−5 T4\times10^{-5}\,\text{T} (c) 8×10−5 T8\times10^{-5}\,\text{T} (d) 4×10−4 T4\times10^{-4}\,\text{T}

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