A) \[2\times {{10}^{-4}}N\], attractive
B) \[2\times {{10}^{-4}}N\], repulsive
C) \[2\times {{10}^{-7}}N\], attractive
D) \[2\times {{10}^{-7}}N\], repulsive
Correct Answer: A
Solution :
\[F=\frac{{{\mu }_{0}}}{4\pi }\frac{2{{i}_{1}}{{i}_{2}}}{a}={{10}^{-7}}\times \frac{2\times 10\times 10}{0.1}=2\times {{10}^{-4}}N\] Direction of current is same, so force is attractive.
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