This document discusses electric currents, which are flows of electric charge that are typically carried by electrons in a conductor. The standard unit for measuring current is the ampere, defined as one coulomb of charge passing per second. Currents can be measured using an ammeter and induce magnetic fields that are important for technologies like motors and generators. Conductors readily allow electric currents due to movable electrons, while insulators have internal charges that do not flow freely, making them poor conductors of current.

1.  An electric current is a flow of electric
charge in the direction opposite to the
Electrons
 The SI unit for measuring an electric current
is the Ampere, which is the flow of electric
charges through a surface at the rate of one
Coulomb per second

2.  Electric current can be measured with an
instrument called Ammeter.
 Electric currents cause many effects, notably
heating, but also induce magnetic fields,
which are widely used for motors, inductors
and generators.

3.  In physics and electrical engineering, a
conductor is an object or type of material that
permits the flow of electric charges in one or
more directions. For example, a wire is an
electrical conductor that can carry electricity
along its length.
 In metals such as Copper or Aluminium, the
movable charged particles are electrons.

5.  An electrical insulator is a material whose
internal electric charges do not flow freely,
and therefore make it very hard to conduct an
electric current under the influence of an
electric field.
 Materials such as Glass, Paper and Teflon,
which have high resistivity, are very good
electrical insulators.