1.

Three charges each +q, are placed at the corners of an isosceles triangle ABC of sides BC and AC, 2a D and E are the mid point of BC and CA. The work done in taking a charge Q and D to E is :A. `(3qQ)/(4pi in_(0)a)`B. `(3qQ)/(8pi in_(0)a)`C. `(qQ)/(4pi in_(0)a)`D. Zero

Answer» Correct Answer - D
`W_(DrightarrowE)=Q[V_E-V_D]`
`therefore V_E=V_DimpliesW_(DrightarrowE)=0`


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