Electric power runs electric motors in factories, provides street lighting in cities and runs appliances and lights in homes.. It also plays an important role in many industrial processe
Trang 1Film Fest
4 AModule
English Toolkit 1 - Technology
Electricity is a form of energy that occurs
everywhere in nature: in space, in the
atmosphere, in atoms and molecules In
animals, including man, weak electrical
impulses are transmitted from one nerve cell
to the next, and they provide signals for the
brain and other parts of the body
Electric power runs electric motors in
factories, provides street lighting in cities
and runs appliances and lights in homes
It also plays an important role in many
industrial processes, such as the electric arc
welding of metals
Electricity everywhere
Thomas Alva Edison (1847 - 1931)
invented the electric light bulb Which were his other famous inventions?
Activities
1 Choose the correct option.
a Electricity occurs
everywhere in nature
in all human cells
in every industrial process
b It provides
street lighting
electric nerves
signals for the atmosphere
c Protons contain
the neutral charges
the positive charges
the negative charges
All ordinary electrical phenomena depend
on forces between electrical charges carried
by protons and electrons Protons contain the positive charges and electrons contain the negative charges
Mankind began to understand electricity from simple observation of natural phenomena In the past 100 years or so, man learnt how to harness and use electricity
This brought about a drastic transformation
in all industrial societies
side contact
brass holder
conductor
glass bulb
filament
base brass cap glass mount conductor hook ring argon
turbine brushes
wires to ouside circuits
magnetic field
N
S
Trang 24 AModule
English Toolkit 1 - Technology
3 In your notebook, write a short description of this diagram.
4 Ask questions for these answers.
2 Match each expression with its definition
a electric
generator
b light bulb
c capacitor
d oscilloscope
e storage
battery
f electrical
system
Energy occurs everywhere in nature
It provides street lighting in cities.
It depends on forces between electrical
charges.
5 Translate the definitions in activity 2
a
b
c
d
e
f
1 a system in which all the conductors and apparatus are
electrically connected to a common source of electromotive force
2 a type of oscillograph that visually displays an electrical wave on
a fluorescent screen
3 a source of electricity, especially one that transforms mechanical
or heat energy into electric energy
4 a battery of electromechanical cells for generating electric current
5 part of an electric lamp
6 condenser
fuel steam plant
steam turbine
transformer transportation substation
industrial user
comercial user
home user
street lights
distribution transformer
electric generator
In protons and electrons
It drastically transformed all industrial societies
From simple observation of natural phenomena.
12,500 25,000 V
138,500 765,000 V
120 V 120 V 34,000 V 12,500 V
600 V