Two parallel very long straight wires carrying current of $5 \text{ A}$ each are kept at a separation of $1 \text{ m}$. If the currents are in the same direction,the force per unit length between them is . . . . . . $\text{N/m}$. $(\mu_0 = 4\pi \times 10^{-7} \text{ SI units})$
- A$5 \times 10^{-5}$,attractive
- B$5 \times 10^{-6}$,attractive
- C$5 \times 10^{-5}$,repulsive
- D$5 \times 10^{-6}$,repulsive
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