Two Long Straight Parallel Wires Separated by a Distance of 20

question 8

Multiple Choice

Two long straight parallel wires separated by a distance of 20 cm carry currents of 30 A and 40 A in opposite directions.What is the magnitude of the resulting magnetic field at a point that is 15 cm from the wire carrying the 30-A current and 25 cm from the other wire?

• A)51 \(\mu\)T
• B)33\(\mu\)T
• C)72 \(\mu\)T
• D)64 \(\mu\)T
• E)46\(\mu\)T

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