Kirchhoff's first and second laws for electrical circuits are consequences of
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conservation of energy
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conservation of electric charge and energy respectively
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conservation of electric charge
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conservation of energy and electric charge respectively
B.
conservation of electric charge and energy respectively
Kirchhoff's first law is junction rule, according to which the algebraic sum of the currents into any junction is zero. The junction rule is based on conservation of electric charge. No charge can accumulate at a junction, so the total charge entering the junction per unit time must equal to charge leaving per unit time.
Kirchhoff's second law is loop rule according to which the algebraic sum of the potential difference in any loop including those associated emf's and those of resistive elements, must equal zero.
This law is basically the law of conservation of energy.
