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JEE Advance 2009
Paper-2
Question
A steady current I goes through a wire loop PQR having shape of a right angle triangle with $\mathrm{PQ}=3 \mathrm{x}, \mathrm{PR}= 4 x$ and $Q R=5 x$. If the magnitude of the magnetic field at $P$ due to this loop is $k\left(\frac{\mu_0 I}{48 \pi x}\right)$, find the value of k .
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