Electric Field Due to Charge Distributions - Approach
Three sides o...
Question
Three sides of a square of side l are occupied by positive charges of density λ C/m. The net electric filed at the centre O is
A
√2kλl
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B
2√2kλl
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C
2kλl
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D
kλl
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Solution
The correct option is B2√2kλl
Here the electric fields due to line charge of top and bottom of square are equal and opposite to each other. So cancel each other and the net electric field at O is only the field due to the line on left side of square.
The electric field at a distance x from the line charge of length l is