State Kirchhoff's rules. Explain briefly how these rules are justified.

Kirchhoff's first rule ( Kirchhoff's Current Law or KCL or Junction Rule) :It state that, the sum of the currents flowing towards a junction is equal to the sum of currents leaving the junction.This is in accordance with the conservation of charge which is the basis of Kirchhoff's current rule.For eg. :I1+I2+I3−I4−I5=0"In any electric network, the algebraic sum of currents meeting at a junction is always zero".∑ I =oKirchhoff's second rule ( Kirchhoff's Voltage Law or KVL Loop rule ) :It state that the algebraic sum of all potential drops and emfs along any closed path in a network is zero.ORThe algebraic sum of the emfs in a loop of a circuit is equal to the algebraic sum of the product of current and resistances in it.Mathematically, the loop rule may be expressed as :∑ E = ∑IRKirchhoff's second law express the conservation of energy.