A) attract each other with a force per unit length of \[{{\mu }_{0}}{{i}^{2}}/(2\pi d)\]
B) repel each other with a force per unit length of \[{{\mu }_{0}}{{i}^{2}}/(2\pi d)\]
C) attract each other with a force per unit length \[{{\mu }_{0}}{{i}^{2}}/(2\pi {{d}^{2}})\]
D) repel each other with a force of per unit length \[{{\mu }_{0}}{{i}^{2}}/(2\pi {{d}^{2}})\]
Correct Answer: A
Solution :
(a) attract each other with a force per unit length of \[{{\mu }_{0}}{{i}^{2}}/(2\pi d)\].
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