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Homework Help: Problem with Electrostatics

  1. Jan 17, 2005 #1
    1. When a piece of cellulose acetate (transparency) is rubbed by stroking it for about 10 to 20 times in one direction and brought towards a piece of rubbed polythene strip,

    i. state what happens, and
    ii. explain the observation.

    2. Before rubbing a polythene strip with a soft cloth, both the strip and the cloth are neutral. After rubbing, the polythene strip is charged negatively.

    a. Does a neutral body possess any charge? Explain.
    b. Is the soft cloth charged after rubbing? If it is, is it charged positively or negatively?
    c. How do you discharge an insulator like a polythene strip?

    Thanks in advance.
  2. jcsd
  3. Jan 17, 2005 #2


    User Avatar
    Science Advisor

    1. The question asks what YOU observe. No one else can tell you that! Go ahead and DO the experiment and see what happens.

    2. What do YOU think? Part (a) certainly should be easy. These are just a matter of knowing the definitions.
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