Kirchhoff’s Loop Law and Energy Conservation – Rankers Physics

Combination of Resistors: Practice Problem & Solution

Assertion (A): Kirchhoff's loop law represents conservation of energy. Reason (R): If the sum of "Potential Differences" around a closed loop is not zero, unlimited energy could be gained by repeatedly carrying a charge around a loop.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Combination of Resistors. Understanding the underlying formula is key to arriving at the correct answer below:

Kirchhoff's loop law states that the algebraic sum of changes in potential around any closed loop is zero, which is a direct consequence of the conservation of energy. If this sum were not zero, it would imply energy creation or destruction, violating energy conservation. Thus, both (A) and (R) are true, and (R) correctly explains (A).

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