Two Long Parallel Wires Carry Currents Of $20 \mathrm {~A}$ And $5.0 \mathrm {~A}$

question 117

Multiple Choice

Two long parallel wires carry currents of $20 \mathrm {~A}$ and $5.0 \mathrm {~A}$ in opposite directions. The wires are separated by $20 \mathrm {~cm}$ . At what point between the two wires do they produce the same strength magnetic field?

• A) \(16 \mathrm {~cm}\) from the \(20 \mathrm {~A}\) wire
• B) \(8.0 \mathrm {~cm}\) from the \(20 \mathrm {~A}\) wire
• C) \(18 \mathrm {~cm}\) from the \(20 \mathrm {~A}\) wire
• D) \(12 \mathrm {~cm}\) from the \(20 \mathrm {~A}\) wire
• E) \(4.0 \mathrm {~cm}\) from the \(20 \mathrm {~A}\) wire

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