Kirchhoff's junction rule (KCL) is a consequence of:
AConservation of energy
BConservation of charge
COhm's law
DFaraday's law
Answer & Solution
Correct answer: B. Conservation of charge
1. KCL: Σ I_in = Σ I_out at any junction; equivalently, net I in = 0.
2. Charge cannot accumulate at a point in a steady current, so total charge entering = total leaving.
3. Kirchhoff's voltage rule (KVL), by contrast, is conservation of ENERGY around a loop.
_Source: NCERT Class 12 Physics Ch 3 §3.9 Kirchhoff's Laws_
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