Here is the picture. Please add to my answer. Thank you. Most Descriptive Answer

Question

Here is the picture. Please add to my answer. Thank you.
Most Descriptive Answer will be awarded points.

Two metal spheres sit on top of insulating pedestals. Sphere A is charged negatively and brought near Sphere B, which is uncharged. Use +'s and -'s to show the approximate distribution of charges on the two spheres. A small lightweight hollow uncharged metal ball, is suspended from a string and hung between the two larger spheres (A & B). It is observed that the ball swings rapidly back and forth, hitting one of the large spheres and then the other. This goes on for about 5 seconds, but then the ball stops swinging. Explain in detail why the ball swings back and forth and why it finally stops swinging. On each collision an amount of positive or negative charge is lost but the amount of positive or negetive charge lost is smaller than the amount necessary to Swing. because of this it will swing tack multiple times but eventually step.

Explanation / Answer

a) a part is correct as -ive on A induces positive charge on one half of it due to which other half( farther from A) will have -ve charge induced in it

b) you have shown charges wrong

initially the smaller ball will be induced +ve charge on half of its face which is faced to ball A ( as it is -vely charged) and other face will be induced -ve charge. initially induced charge will be more but when it hits the balls, the -ve and +ve charge will nutralize each other hence reducing the attracting force. so finally it will come to rest

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