Question
Explain what happens when a positive charge is kept near a negative charge?
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Answer
When a positive charge is kept near a negative charge then there will be an attraction between the positive and negative charge because unlike charges attract each other. For example: When an ebonite rod and glass rod are brought close to each other there will be an attraction as shown in the figure below. A charged glass rod attracts a charged plastic straw.
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→$a.$ Covered with silk cloth.
$b.$ Covered with a layer of sand.
$c.$ Covered with a glass sheet. On which surface will the marble move the shortest distance.
Give reason for your answer.