Two horizontal thin long parallel wires, separated by a distance r carry current I each…

Physics · Class 12 · CBSE — Moving Charges and Magnetism

1. zero
2. \(\left(\frac{\mu_0 I}{2 \pi r}\right)\) vertically downward
3. \(\left(\frac{2 \mu_0 \mathrm{I}}{\mathrm{r}}\right)\) vertically upward
4. \(\left(\frac{\mu_0 I}{\pi r}\right)\) vertically downward

Answer

(D) ( _0 I r ) vertically downward

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