Physics Current Electricity UHS 2022
PMDC Verified Question 54 of 112
Which of the following statement is NOT CORRECT Kirchhoff's rule?
A
Kirchhoff's current rule based upon the law of conservation of charge
B
Wheatstone bridge is an application of Kirchhoff's rule
C
Kirchhoff's rules are more suitable in AC circuits
D
Kirchhoff's voltage rule based upon the law of conservation of energy
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Kirchhoff's rules are more suitable in AC circuits
Concept:

Kirchhoff's circuit laws are foundational to analyzing complex circuits, mostly modeled around DC circuits.

Solution:

  • Opt A: True. KCL states sum of currents entering a junction equals sum leaving (conservation of charge).


  • Opt B: True. The bridge formula is derived using Kirchhoff's rules.


  • Opt D: True. KVL states the sum of voltages around a closed loop is zero (conservation of energy).


  • Opt C: False. Kirchhoff's rules are primarily designed and most suitable for DC circuits. In high-frequency AC circuits, parasitic capacitance and inductance make standard KVL/KCL assumptions (like instantaneous propagation) inaccurate without complex modifications.


Why other options are incorrect:

  • The question asks for the statement that is NOT correct, making C the target answer.

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