A body is positively charged, it implies that
there is only positive charge in the body
there is positive as well as negative charge in the body but the positive charge is more than negative charge
there is equal positive and negative charge in the body but the positive charge lies in the outer regions
negative charge is displaced from its position
Get Answer
When we say that a body is charged, we always mean that the body is having excess of electrons (negatively charged) or is of deficient of electrons (positively charged).
On rubbing, when one body gets positively charged and other negatively charged, the electrons transferred from positively charged body to negatively charged body are
valence electrons only
electrons of inner shells
both valence electrons and electrons of inner shell
yet to be established
Valence electrons are outermost electrons these can get transferred on rubbing.
On charging by conduction, mass of a body may
increase
decreases
increase or decrease
None of these
Metal knob of a gold leaf electroscope is touched with a positively charged rod. When it is taken away the leaves stay separated. Now metal knob is touched by negatively charged rod. Separation between the leaves
increases
remains same
first increases then decreases.
On touching the metal knob with a positively charged rod some electrons from the gold leaves get transferred to the rod making gold leaves positively charged and they get separated. When a negatively charged rod is touched with metal knob some negative charge flows to the gold leaves lessening the positive charge there and the separation between the leaves decreases.
A small metal ball is brought into contact alternatively with points and of the charged body shown in figure. After each contact the charge of the ball is determined approximately by touching it against an electroscope. If and are the charges, then
The charge density nearby is greatest and at , it is least.
What happens when some charge is placed on a soap bubble?
Its radius decreases
The bubble collapses
Its radius increases
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