Two Parallel Conductors Are Carrying Currents in the Opposite Direction $\mu$

question 55

Multiple Choice

Two parallel conductors are carrying currents in the opposite direction. The currents are non-zero and not necessarily equal. The magnitude of the magnetic field midway between them is 40 $\mu$ T. If one of the currents then has its direction reversed, what is the resulting magnitude of the magnetic field midway between them?

• A) a value greater than 40 \(\mu\)T
• B) a value less than 40 \(\mu\)T
• C) 40 \(\mu\)T
• D) It could be any value.

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