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Question

Two long parallel wires are separated by a distance of 2 m and carry current 2 A each in opposite directions. The magnitude of magnetic field at point P between the conductors is

A
μ0πT
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B
Zero
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C
μ02πT
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D
2μ0πT
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Solution

The correct option is D 2μ0πT
Field due to the first wire at point P=μ0 I2π d=μ0×22π×1=μ0π T
Field due to the second wire, B2=μ02π×21=μ0πT
Let the net field at point P due to both the wires be Bp
BP=B1+B2=μ0π+μ0π=2μ0πT
Hence, the correct answer is option (4).

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