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Figure below shows two very long conduct...

Figure below shows two very long conductors PQ and Rs kept parallel to each other in vacuum at a distance of 20 cm. They carry currents of 5 A and 15 A, respectively, in the same direction, as shown. Find the resultant magnetic flux density `vec(B_(R))` at a point M which lies exactly midway between PQ and RS.

Text Solution

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Apply the relation `B=(mu_(0))/(2pi)((I)/(a))`, then calculate `B=B_(2)-B_(1)`.
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