Electronics Tutorial for Beginners
ABC of Electronics Offering free comprehensive basic
electronics tutorial. In this Electronics Tutorial we
have explained the basic electronic concepts. Here you
can find 8051 Tutorials & 555 Timer Tutorials which are
commonly used in electronics.
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Alternating Current
At our residences we are
delivered
current
which we call Alternating Current. It is called alternating
current due to the fact that direction of current flowing is
constantly reversed back and forth. This Alternating Current
comes to your home from power plants made by electronic
companies. Alternating Currents are cause of Alternating
Voltages. Wires which carry audio and radio signals are also
examples of Alternating Current. AC voltage can be increased
or decreased with help of a
transformer.
For this purpose we can use a Step-up or a Step-Down
transformers respectively.
AC Voltage Mathematical Formula
-
v(t)=Vp.sin(wt)
where
Power loss in a conductor-
From below formula of power loss say I=4
amperes and
resistance value is 1 then (power loss)
P=4*4*1=16 times more power loss on increasing current 4
times. Power loss here is a product of the square of the
current I and the resistance R of the conductor given by the
formula
P=I*I*R
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