AP Physics 2: Algebra-Based Flashcards: Kirchhoff's Loop Rule
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
How does the conservation of energy explain Kirchhoff's loop rule?
Conservation of energy dictates that a charge cannot gain or lose a net amount of energy after returning to its starting point in a circuit, so the sum of potential changes must be zero.
Card 1 of 10
All Flashcards (10)
How does the conservation of energy explain Kirchhoff's loop rule?
Conservation of energy dictates that a charge cannot gain or lose a net amount of energy after returning to its starting point in a circuit, so the sum of potential changes must be zero.
What fundamental principle of physics is Kirchhoff's loop rule a consequence of?
Kirchhoff's loop rule is a consequence of the conservation of energy.
How can you visually represent the changes in electric potential around a circuit loop?
The values of electric potential at points in a circuit can be represented by a graph of electric potential as a function of position within the loop.
What is a 'closed loop' in the context of a circuit?
A closed loop is any continuous path through circuit elements that starts and ends at the same point.
According to the loop rule, what is the net change in electric potential after traversing a complete, single closed loop in a circuit?
The net change in electric potential after traversing a complete loop is zero, as you must return to your starting potential.
What is the mathematical equation for Kirchhoff's loop rule?
The equation for Kirchhoff's loop rule is ΣΔV = 0.
What is Kirchhoff's loop rule?
Kirchhoff's loop rule states that the sum of potential differences across all circuit elements in a single closed loop must equal zero.
What is the primary use of Kirchhoff's loop rule in circuit analysis?
It is applied to describe a circuit or its elements by setting the sum of potential differences around any closed loop to zero.
If you create a graph of electric potential vs. position for a complete loop, what must be true about the graph's start and end points?
The graph's starting and ending potential values must be identical, visually demonstrating that the total potential difference is zero.
What does the term ΣΔV in the loop rule equation represent?
It represents the sum of all the individual potential increases (e.g., across batteries) and potential decreases (e.g., across resistors) in a closed loop.