KIRCHOFF'S LAW Flashcards
Voltage in Series
๐ฝ๐ป = ๐ฝ๐ + ๐ฝ๐ + ๐ฝ๐ โฆ
๐น๐ป = ๐น๐ + ๐น๐ + ๐น๐โฆ
๐ฐ๐ป = ๐ฐ๐ = ๐ฐ๐ = ๐ฐ๐ โฆ
Voltage in Parallel
๐ฝ๐ป = ๐ฝ๐ = ๐ฝ๐ = ๐ฝ๐ โฆ
๐/๐น๐ป= ๐/๐น๐ + ๐/๐น๐ + ๐/๐น๐ โฆ
๐ฐ๐ป = ๐ฐ๐ + ๐ฐ๐ + ๐ฐ๐ โฆ
He developed a pair or set of
rules or laws which deal
with the conservation of
current and energy within
electrical circuits.
Gustav Robert Kirchhoff
Two rules are commonly known as
Kirchhoffโs Current Law (KCL)
Kirchhoffโs Voltage Law (KVL)
one of Kirchhoffโs laws dealing with the current flowing around a closed circuit
Kirchhoffโs Current Law (KCL)
The other law deals with the voltage
sources present in a closed circuit
Kirchhoffโs Voltage Law (KVL)
โtotal current or charge
entering a junction or node is exactly
equal to the charge leaving the node as it
has no other place to go except to leave,
as no charge is lost within the nodeโ
Kirchhoffโs Current Law
E ๐ฐ (entering) = E ๐ฐ (exiting)
Kirchhoffโs Current Law (KCL)
โin any closed loop network, the
total voltage around the loop is equal to the sum of all the voltage drops within the same loopโ which is also equal to zero. In other words the algebraic sum of all voltages within the loop must be equal to zero
Kirchhoffโs Voltage Law (KVL)
เทE V=0
Kirchhoffโs Voltage Law (KVL)
Application of KCL and KVL:
- Assume all voltages and resistances are given. ( If not
label them V1, V2,โฆ R1, R2, etc. ) - Assigns a current to each branch or mesh (clockwise or
anticlockwise) - Label each branch with a branch current. (I1,I2,I3 etc.)
- Find Kirchhoffโs first law equations for each node.
- Find Kirchhoffโs second law equations for each of the
independent loops of the circuit. - Use Linear simultaneous equations as required to find
the unknown currents.
Current entering the Node Equals to Current __________ the Node
Leaving
This is an example of? ๐ฐ๐ + ๐ฐ๐ + ๐ฐ๐ = ๐ฐ๐ + ๐ฐ๐
KCL
The sum of all the voltage Drops around the loop is equal to ___.
zero (0)
