A straight conductor carries a current of

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

Problem

A straight conductor carries a current of 5 A5\,\text{A}. Calculate the magnetic field strength at a point 2 cm2\,\text{cm} away from the wire. (Take μ0=4π×10−7 T m A−1\mu_0 = 4\pi \times 10^{-7}\,\text{T m A}^{-1}.) (a) 2.5×10−5 T2.5 \times 10^{-5}\,\text{T} (b) 5.0×10−4 T5.0 \times 10^{-4}\,\text{T} (c) 5.0×10−5 T5.0 \times 10^{-5}\,\text{T} (d) 5.0×10−6 T5.0 \times 10^{-6}\,\text{T}

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