Two parallel line charges \( +\lambda \) and \( -\lambda \) are placed with a separation distanc...

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Two parallel line charges \( +\lambda \) and \( -\lambda \) are placed with a separation distance \( R \) in free space. The net electric field exactly mid way between the two line charge is
a. Zero
b. \( \frac{2 \lambda}{\pi \varepsilon_{0} R} \)
c. \( \frac{\lambda}{\pi \varepsilon_{0} R} \)
d. \( \frac{1}{2 \pi \varepsilon_{0} R} \)
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