What are Electric Conductors and Insulators, Electricity and Circuits,

conductors and insulators in this module
you will learn about conductors and
insulators what we see here is a simple
electric circuit which consists of a
cell a key connecting wires and above
as we close the key the valve closed
this is because on closing the key the
circuit gets complete an electric
current flows through it making the bulb
glow now let us cut any one of the
connecting wires we observe that the
bulb does not glow this time this
happens because the circuit breaks an
electric current stops flowing through
it so we now have two free ends of
connecting wires let us connect these
two ends to an iron nail hey the buzz
starts to glow this means that the iron
nail completes the circuit and a last
electric current to flow through it the
materials that allow current to flow
through them are called conductors
certain nonmetals like water and
graphite that is pencil-lead however are
conductors human beings still conduct
electricity as they have a large amount
of water in their body that is why we
get an electric shock if we accidentally
touch a live wire to protect us from
electric shock all the connecting wires
are covered with insulator such as
plastic also the handles of devices like
pliers and screwdrivers used by an
electrician are made of plastic in this
module you have learned materials that
allow electric current to flow through
them are called
conductors
most metals and certain nonmetals like
water and graphite are conductors
materials that do not allow electric
current to flow through them are called
insulators plastic rubber and glass are
insulators