Define Kirchhoff's Law
Answers
Explanation:
Kirchhoff's laws are fundamental to circuit theory. They quantify how current flows through a circuit and how voltage varies around a loop in a circuit.
Kirchhoff's current law (1st Law) states that current flowing into a node (or a junction) must be equal to current flowing out of it. This is a consequence of charge conservation.
Kirchhoff's voltage law (2nd Law) states that the sum of all voltages around any closed loop in a circuit must equal zero. This is a consequence of charge conservation and also conservation of energy.
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Kirchhoff in 1942 put
forward the following two laws to solve the
complicated circuits. Tese two laws are stated
as follows :
Kirchhoff ’s First law or Kirchhoff ’s junction
rule or Kirchhoff ’s current law : It states that
the algebraic sum of the currents meeting at a
junction is zero.
– Kirchhoff ’s First law supports the law of
conservation of charge.
– According to sign convention the current
Following towards a junction is taken as
positive and the current flowing away from
the junction is taken as negative.
Kirchhoff’s second law or Kirchhoff ’s loop law
or Kirchhoff’s voltage law : It states that in a
closed loop, the algebraic sum of the emfs is
equal to the algebraic sum of the products of the
resistance and the respective currents fowing
through them.