large Power Stations and distributed around
the United Kingdom the National Grid the end user. 10. supply because easy change the voltage levels using a
transformer.
Key Fact
Definitions
● Try remember these a. circuit
definitions
● Write them down helps. supply generated Power Station exactly the same Fig.
. voltage the loop coils wire as
shown the display cathode ray oscilloscope. Let first define some our terms of
reference.1
except that powerful electromagnets are used and the power for rotation
comes from steam turbine.c.
In this section will first all consider the theoretical circuits pure
resistance, inductance and capacitance acting alone a.c.c. The basic principle of
the a.c. 10. circuit
before going consider the practical circuits resistance, inductance
and capacitance acting together.1
Simple a.Baisc Electrical Installation Work
194
Alternating current theory
Commercial quantities electricity for industry, commerce and domes-
tic use are generated a. generator alternator.1 will cut the north south lines
of magnetic flux and induce a.c. supply, alternating current supply.
Rotating simple loop wire coils wire between the poles mag-
net such that shown simplified Fig.c.
Cathode
ray
oscilloscope
Rotation
N
S
Carbon brushes
Slip rings
FIGURE 10. elec-
tricity has many applications where portability emergency stand-by
supply important but for large quantities power has an
a.c.c. The d.c.
This a
