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Grade: 7
        
The uncharged metallic sphere X is suspendef as shown in the given figure is given a push towards the +ve plate.Which of the following statement is correct and why?
       1. X touches the positive plate and remains in contact with it.
       2. X touches positive plate and then moves towards negative plate and remains in contact with it.
      3. X moves to and fro between the two plates with a constant time period.
      4. X moves to and fro between the two plates with an increasing time period.
10 months ago

Answers : (1)

Arun
24740 Points
							
The two charged plates create a region with a uniform electric field between them, directed from the positive towards the negative plate.
Once the ball is disturbed so as to touch one plate (say, the negative one), some negative charge will be transferred to the ball and an electric force will act on the ball, that will accelerate it to the positive plate.
Once the ball touches the positive plate, it will re’ewe its negative charge, acquire a positive charge and at accelerate back to the negative plate. The metallic ball will continue to move back and forth between the plates until it has transferred all their net charge, thereby making both the plates neutral
10 months ago
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