Three charges, each +q, are placed at the corners of an isosceles triangle ABC of sides BC and AC, 2$a$. D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is

Question

${{3qQ} \over {4\pi {\varepsilon _0}a}}$

${{3qQ} \over {8\pi {\varepsilon _0}a}}$

${{qQ} \over {4\pi {\varepsilon _0}a}}$

zero

Solution

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