NEET 2019 Physics question
Two parallel infinite line charges with linear charge densities C/m and C/m are placed at a distance of in free space. What is the electric field mid-way between the two line charges?
Answer: (3)
Solution
The field of an infinite line charge at a distance is . At the mid-point each line is at a distance , so each contributes a magnitude . The field of points away from it and the field of points towards it; at the
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