A) energy and charge
B) charge and energy
C) mass and charge
D) none of the above
Correct Answer: B
Solution :
From Kirchhoffs first law, in an electric circuit, the algebraic sum of the currents meeting at any junction in the circuit is zero, that is \[{{i}_{1}}+{{i}_{1}}+{{i}_{3}}+{{i}_{4}}=0\]
\[\Rightarrow \] \[\sum{i}=0\] Thus, Kirchhoffs first law expresses the conservation of charge. Kirchhoffs second law states that in any closed mesh of a circuit, the algebraic sum of the products of current and the resistance in each part is equal to the algebraic sum of the emfs in that mesh i.e., \[\sum{iR}=\sum{E}\] Hence, second law expresses the conservation of energy.
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