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CBSE Class 12-science Answered

describe an experiment to show that there are only two kinds of electric charges
Asked by Balan | 18 Mar, 2018, 12:11: PM
answered-by-expert Expert Answer
 
Let us suspend two pith balls as shown in figure(a). A glass rod after rubbed with silk or woolen cloth is touched to the pith balls.
We will observe the pith balls are getting repelled. Similarly a ebonite or plastic rod is rubbed with fur is touched to the pith balls.
We again observe there is a repulsion between the pith balls as shown in figure (b). When a pith ball is touched with a glass rod after rubbing 
with silk and another pith ball is touched with plastic rob rubbed with fur, we observed the two pith balls attract each other.
These experiment shows that (i) only there are two kinds of charges, we call it as they are +(positive) and -(negative).
(ii) similar charges repel each other, but opposite charges attract each other.
Answered by Thiyagarajan K | 18 Mar, 2018, 05:03: PM

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