A rectangular loop of sides \( a \) and \( b \) is placed in \( x y \) plane. A very long wi...

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A rectangular loop of sides \( a \) and \( b \) is placed in \( x y \) plane. A very long wire is also placed in \( x y \) plane such that side of length \( a \) of the loop is parallel to the wire. The distance between the wire and the nearest edge of the loop is \( d \) . The mutual inductance of this system is proportional to
(a) \( a \)
(b) \( b \)
(c) \( 1 / d \)
(d) Current in wire
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