Two Charges Q₁ and Q₂ Are Distance D Apart

question 39

Multiple Choice

Two charges Q₁ and Q₂ are distance d apart.If the electric field is zero at distance 3d/2 from Q₁ and d/2 from Q₂,along the line joining Q₁ and Q₂,then what is the relation between Q₁ and Q₂?

• A)Q₁ = 9Q₂
• B)Q₁ = -Q₂ /9
• C)Q₁ = Q₂ /3
• D)Q₁ = -3Q₂
• E)Q₁ = -9Q₂

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