STATIC ELECTRICITY
It can be shown that there are two kinds of charges by rubbing a glass rod with silk and hanging it from a long silk thread. If a second glass is rubbed with silk and held near the rubbed end of the first, the rod will repel each other.
On other hand, a hard rubber is
rubbed with far, will attract the glass rod rubbed with silk. The modern view
of bulk matter is that in its normal i.e neutral, it contains equal amount of
positive and negative charges.
If two bodies like glass and silk
are rubbed together, a small amount of charge is transferred from…… to the
other upsetting the electric neutrality of each. In this case the glass would
become positive and silk negative.
FORCE BETWEEN TWO CHARGES OR ANY TWO
CHARGED BODIES
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