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