The Loop Rule

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Section 10.3 The Loop Rule

Principle 10.3.1. The Loop Rule.

The Loop Rule says that the voltages around a complete loop add to zero. The Loop Rule is often written as:

\begin{equation*} \sum V = 0 \end{equation*}

Note that when writing equations involving circuits, it is customary to write the voltage across a circuit element as $V$ rather than $\Delta V\text{;}$ however, $V$ still fundamentally represents a potential difference.

The Loop Rule is based on conservation of energy.

Exercises Activities

1.

Return back to Exercise 10.2.2 from the previous section. Apply the loop rule to that circuit. How do your answers compare with what you now know about the loop rule?

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Section 10.3 The Loop Rule

Principle 10.3.1. The Loop Rule.

Exercises Activities

1.