Substances that do not allow free flow of charge through them are called __________.
Substances which allow electric charge to flow through them are called
True or false?
(a) When two substances are rubbed on each other, like charges are developed on each.
(b) An atom may have either a positive or a negative charge.
(c) Substances that allow the flow of electricity are called good conductors.
(d) If the leaves of the electroscope spread only a little, the charge on them is greater.