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Kirchhoff's first and second laws for electrical circuits are consequences of :-
A
Conservation of energy
B
Conservation of electric charge and energy respectively
C
Conservation of electric charge
D
Conservation of energy and electric charge respectively
Detailed Solution
Kirchhoff's first law (junction rule): the algebraic sum of the currents meeting at a junction is zero, $\Sigma I = 0$.
It means that charge does not accumulate at a junction: the charge entering per second equals the charge leaving per second. So it is a consequence of the conservation of electric charge.
Kirchhoff's second law (loop rule): the algebraic sum of the changes in potential around any closed loop is zero, $\Sigma \varepsilon = \Sigma IR$.
It means that the energy gained by a charge from the sources in going round a closed loop equals the energy it loses in the resistances. So it is a consequence of the conservation of energy.
Hence the first and second laws are consequences of the conservation of electric charge and energy respectively.
It means that charge does not accumulate at a junction: the charge entering per second equals the charge leaving per second. So it is a consequence of the conservation of electric charge.
Kirchhoff's second law (loop rule): the algebraic sum of the changes in potential around any closed loop is zero, $\Sigma \varepsilon = \Sigma IR$.
It means that the energy gained by a charge from the sources in going round a closed loop equals the energy it loses in the resistances. So it is a consequence of the conservation of energy.
Hence the first and second laws are consequences of the conservation of electric charge and energy respectively.