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Equal currents i=1 A are flowing through...

Equal currents `i=1` A are flowing through the wires parallel to y-axis located at `x=+1m, x=+2m, x=+4m` and so on...., etc. but in opposite directions as shown in Fig The magnetic field (in tesla) at origin would be

A

`-1.33 xx 10^(-7)hatK`

B

`1.33 xx 10^(-7)hatK`

C

`2.67 xx 10^(7)hatk`

D

`-2.67 xx 10^(7)hatk`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Infinite wires, each carrying a current 0.5 A, are kept parallel to y-axis and intersecting x-axis at x=+-1 m, +02 m , +-4 m , +-8m etc. Wires kept at positive values of x carry current in the same direction while wires kept at negative values of x carry current successively in opposite directions as shown in Fig. A wire is kept parallel to x-axis and intersecting y-axis at y=2 m. It carries a current i. Assuming this wire to be insulated from others then the current i in it such that magnetic induction at O is zero is (assuming each wire to be infinitely long)

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