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JEE Main 2004 Physics question

PhysicsElectric Charges and FieldsJEE Main 2004

A charged oil drop is suspended in a uniform field of V/m so that it neither falls nor rises. The charge on the drop will be (take the mass of the charge kg and )

Answer: (1)

Solution

Balance: \frac{9.9×10^{-15}×10}{3×10^4}$

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Question ID VK-038328