Question

Q1) A negatively charged rod is brought close to some small pieces of neutral paper. The positive sides of molecules in the paper are attracted to the rod and the negative sides of the molecules are repelled. Since negative and positive sides are equal in number, why don't the attractive and repulsive forces cancel out?
Q2) (a) If a drop of liquid has capacitance 1.00 pF, what is its radius?
(b) If another drop has radius 2.00 mm, what is its capacitance?
(c) What is the charge on the smaller drop if its potential is 100 V?

Answer 1

Q1.) No they will not get cancelled because ,Electrostatic forces are there between rod and small pieces which make them to separate.

Q2.) —
a.) 2.00
b.) 1.00
c.) The charge of smaller drop is positive.