Two long parallel straight wires, each carrying a current I are separated by a distance r. If the currents are in opposite directions, then the strength of the magnetic field at any point midway between the two wires is

$\frac{μ_{0} I}{π r}$

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$\frac{2 μ_{0} I}{π r}$

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$\frac{μ_{0} I}{2 π r}$

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$Z e r o$

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Solution

The correct option is B
$\frac{2 μ_{0} I}{π r}$

$B_{1} = \frac{μ_{0} I}{2 π (\frac{r}{2})} \oplus B_{2} = \frac{μ_{0} I}{2 π (\frac{r}{2})} \oplus \Rightarrow B = \frac{2 μ_{0} I}{π r} \oplus$

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Two long parallel straight wires, each carrying a current I are separated by a distance r. If the currents are in opposite directions, then the strength of the magnetic field at any point midway between the two wires is

The correct option is B 2μ0Iπr B1=μ0I2π(r2)⊕B2=μ0I2π(r2)⊕⇒B=2μ0Iπr⊕

The correct option is B
$\frac{2 μ_{0} I}{π r}$

$B_{1} = \frac{μ_{0} I}{2 π (\frac{r}{2})} \oplus B_{2} = \frac{μ_{0} I}{2 π (\frac{r}{2})} \oplus \Rightarrow B = \frac{2 μ_{0} I}{π r} \oplus$