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AB is a current-carrying conductor in th...

AB is a current-carrying conductor in the plane of the paper as shown in figure. What are the directions of magnetic fields produced by it at point P and Q? Given `r_1gtr_2`, where will the strength of the magnetic field be larger?

Text Solution

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(i) Magnetic field is into the plane of the paper at P and out of it at the point Q.
(ii) Since `Bprop1/r`, B at Q is greater than B at P as `r_1gtr_2`.
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