Two Parallel Conductors Are Carrying Currents in the Same Direction

question 37

Multiple Choice

Two parallel conductors are carrying currents in the same direction.The currents are non-zero and not necessarily equal.The magnitude of the magnetic field midway between them is 40 mT.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 mT
• B)40 mT
• C)a value less than 40 mT
• D)It could be any value.

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