Two thin long parallel wires separated by a distance b are carrying a current i amp each. The magnitude of the force per unit length exerted by one wire on the other is [CPMT 1991; IIT 1986; Bihar MEE 1995; RPMT 1997; MP PET 1996; MP PMT 1994, 96, 99; UPSEAT 2001, 03]

\[\cos e{{c}^{-1}}\left( \frac{H}{{{H}_{0}}} \right)\]

\[\frac{{{\mu }_{0}}{{i}^{2}}}{{{b}^{2}}}\]

\[\frac{{{\mu }_{0}}{{i}^{2}}}{2\pi b}\]

\[\cos e{{c}^{-1}}\left( \frac{H}{{{H}_{0}}} \right)\]

\[\frac{{{\mu }_{0}}i}{2\pi {{b}^{2}}}\]

Two thin long parallel wires separated by a distance b are carrying a

1.	Two thin long parallel wires separated by a distance b are carrying a current i amp each. The magnitude of the force per unit length exerted by one wire on the other is [CPMT 1991; IIT 1986; Bihar MEE 1995; RPMT 1997; MP PET 1996; MP PMT 1994, 96, 99; UPSEAT 2001, 03]
A.	\[\frac{{{\mu }_{0}}{{i}^{2}}}{{{b}^{2}}}\]
B.	\[\frac{{{\mu }_{0}}{{i}^{2}}}{2\pi b}\]
C.	\[\cos e{{c}^{-1}}\left( \frac{H}{{{H}_{0}}} \right)\]
D.	\[\frac{{{\mu }_{0}}i}{2\pi {{b}^{2}}}\]
Answer» C. \[\cos e{{c}^{-1}}\left( \frac{H}{{{H}_{0}}} \right)\]

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Two thin long parallel wires separated by a distance b are carrying a current i amp each. The magnitude of the force per unit length exerted by one wire on the other is [CPMT 1991; IIT 1986; Bihar MEE 1995; RPMT 1997; MP PET 1996; MP PMT 1994, 96, 99; UPSEAT 2001, 03]

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