A steady current \( I \) goes through a wire loop \( P Q R \) P hav...

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A steady current \( I \) goes through a wire loop \( P Q R \)
P having shape of a right angle triangle with \( P Q= \)

W \( 3 x, P R=4 x \) 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 \( k \).
(A) 4
(B) 5
(C) 6
(D) 7
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