Physics - Current Electricity Question with Solution | TestHub

Kirchhoff's junction rule (or current law) states that the algebraic sum of currents entering a junction is equal to the algebraic sum of currents leaving it. This implies that charge cannot accumulate at a junction, hence it is based on the conservation of charge. Kirchhoff's loop rule (or voltage law) states that the algebraic sum of potential differences around any closed loop in a circuit is zero. This implies that the total work done on a unit charge moving around a closed loop is zero, which is a statement of the conservation of energy. Both Assertion (A) and Reason (R) are true statements. However, Reason (R) explains the basis of the loop rule, not the junction rule, so it is not a correct explanation for Assertion (A).