2. Electricity:definitions
● Electricity is the manifestation of
energy associated with electrical
charges.
● Electricity can be transformed into
other forms of energy, like luminous,
heat, mechanical energy...
3. Conductors-Insulators
● Conductors
Materials that allows the flow
of an electrical current
All metals: copper, Aluminum,
gold , silver, tin, steel, iron
● Insulators
Materials whose internal
electric charges do not flow
freely
Glass, wood, plastics,
ceramics, wool
4. Electrical Circuit
Electrical Current: The movement of electrical charges
through conductive materials.
An electrical circuit is a set of elements connected to one
another so that an electrical current can circulate through
them.
5. Components of an
electrical circuit
● A power source
● A load
● Conductors
● Control devices
● Protective devices
8. Types of circuits
● Series connections ● Parallel connections
● Each load has the same voltage as the battery
● If a load breaks or is disconnected, the other
loads continue working
● The total electrical current of the circuit is the
sum of the currents of each load.
● The same electrical current circulates
through each load
● The voltage provided by the battery is
divided among the loads
● If a load breaks or is disconnected, the
other loads on the circuit stop working.
9V
