Two straight wire A and B of lengths 10 m and 12 m carrying currents of 4.0 A and 6.0 A respectively in opposite direction, lie parallel to each other at a distance of 3.0 cm. The force on a 15 cm section of the wire B near its center is
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Verified by ExpertsThe correct answer is:
B
The lengths of the two wires are quiet large as compared to the separation between them. The two wires may be regarded as infinitely long wires. The force per unit length of wire 
due to 
,
Force on 15 cm or 0.15 cm section of 
,
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