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A very small sphere of mass 80 g having ...

A very small sphere of mass `80 g` having a charge q is held at a height of `9 m` vertically above the center of a fixed conducting sphere of radius `1 m`, carrying an equal charge q. When released, it falls until it is repelled back just before it comes in contact with the shpere as shown in Fig. 47. Calculate the charge `q. [g = 10 ms^-2]`.

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To solve the problem, we need to analyze the forces acting on the small sphere and use the concept of energy conservation. We will calculate the charge \( q \) on the small sphere. ### Step 1: Understand the Forces Acting on the Sphere When the small sphere is released, it experiences two forces: 1. Gravitational force acting downward, \( F_g = mg \) 2. Electrostatic force due to the repulsion from the conducting sphere. ### Step 2: Calculate the Gravitational Force ...
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