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State the Kirchhoff's rules used in elec...

State the Kirchhoff's rules used in electric networks. How are these rules justified ?

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Statement of Kirchhoff's laws Justification.
Junction Rule: At any junction, the sum of currents, entering the junction, is equal to the sum of currents leaving the junction.
Loop Rule: The algebraic sum of changes, in potential, around any closed loop involving resistors and cells, in the loop is zero.
`Sigma(DeltaV)=0`
Justification: The first law is in accord with the law of conservation of charge
SEconds law is in accord with the law of conservation of energy.
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