Kirchhoff's junction rule and loop rule are based on which of the following conservation laws respectively?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → charge and energy
The junction rule says that the current entering a junction equals the current leaving it. For steady currents no charge piles up at a junction, so this is conservation of charge.
The loop rule says that the algebraic sum of the potential changes around a closed loop is zero. A charge taken once round the loop returns to its starting point with no net gain or loss of energy, so this is conservation of energy.