STANDARDPhysics-Electrostatics
STANDARD Physics Electric Field Due to Line Charges MCQ Question
Type: MCQ-conceptual-Medium
Two parallel infinite line charges +λ and −λ are placed with a separation distance R in free space. The net electric field exactly mid-way between the two line charges is
A
zero
B
2λ / (πε₀R)
C
λ / (πε₀R)
D
λ / (2πε₀R)
Correct Answer
Option B
Detailed Explanation
The electric field due to each line charge at the midpoint is λ / (2πε₀(R/2)). Since the fields are in the same direction, they add up to give E_net = 2λ / (πε₀R).
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