Information about Electronics;
Kirchhoff's
Voltage Law(KVL) is Kirchhoff's second law that
deals with the conservation of energy around a closed circuit path. ...
His voltage law states that for a closed loop series path the algebraic
sum of all the voltages around any closed loop in a circuit is
equal to zero.
Explanation;
Gustav
Kirchhoff’s Voltage Law is the second of his
fundamental laws we can use for circuit analysis. His voltage law states that
for a closed loop series
path the algebraic sum of all the
voltages around any closed loop in a circuit is equal to zero. This is
because a circuit loop is a closed conducting path so no energy is lost.
In
other words the algebraic sum of ALL the potential differences around the loop
must be equal to zero as: ΣV = 0. Note
here that the term “algebraic sum” means to take into account the polarities
and signs of the sources and voltage drops around the loop.
This
idea by Kirchhoff is commonly known as the Conservation of Energy, as moving around
a closed loop, or circuit, you will end up back to where you started in the
circuit and therefore back to the same initial potential with no loss of
voltage around the loop. Hence any voltage drops around the loop must be equal
to any voltage sources met along the way.
Kirchhoff’s Circuit Loop;
We have
seen here that Kirchhoff’s voltage law, KVL is Kirchhoff’s second law and
states that the algebraic sum of all the voltage drops, as you go around a
closed circuit from some fixed point and return back to the same point, and
taking polarity into account, is always zero. That is ΣV = 0
The
theory behind Kirchhoff’s second law is also known as the law of conservation
of voltage, and this is particularly useful for us when dealing with series
circuits, as series circuits also act as voltage dividers and the voltage
divider circuit is an important application of many series circuits.
