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Nodal analysis is based on:
AJust Ohm
BKVL
CKCL — sum of currents at each non-reference node = 0
DRandom
Answer & Solution
Correct answer: C. KCL — sum of currents at each non-reference node = 0
Nodal analysis: assign one reference node (ground). Write KCL for each other node in terms of node voltages. Express currents as (V_j - V_k)/R via Ohm. Solve simultaneously. For N+1 nodes: N equations. Effective when many parallel elements.
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