Two parallel

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

Two parallel, infinitely long straight wires are 4.0 cm4.0\,\text{cm} apart and carry currents I1=10 AI_1 = 10\,\text{A} and I2=15 AI_2 = 15\,\text{A} in the same direction. Calculate the magnitude of the magnetic field at the point midway between the wires. (μ0=4π×10−7 T m A−1)(\mu_0 = 4\pi\times10^{-7}\,\text{T m A}^{-1}) (a) 2.5×10−4 T2.5\times10^{-4}\,\text{T} (b) 1.0×10−4 T1.0\times10^{-4}\,\text{T} (c) 5.0×10−5 T5.0\times10^{-5}\,\text{T} (d) 2.5×10−5 T2.5\times10^{-5}\,\text{T}

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