Final answer:
Kirchhoff's Loop Rule is a principle used to analyze electrical circuits, stating that the sum of the potential differences around any closed loop in a circuit is equal to zero. In a circuit with two resistors connected in series and a battery as the power source, two loops are present.
Step-by-step explanation:
Kirchhoff's Loop Rule, also known as the Second Rule of Kirchhoff, is a principle used to analyze electrical circuits. According to this rule, the sum of the potential differences (voltages) around any closed loop in a circuit is equal to zero. This means that in a closed loop, the voltage drops across the components are balanced by the voltage rises across the power sources.
For example, in a circuit with two resistors connected in series and a battery as the power source, there are two loops present. Loop 1 consists of the battery and the first resistor, while Loop 2 consists of the first resistor and the second resistor. By applying Kirchhoff's Loop Rule to Loop 1 and Loop 2 separately, we can find the voltage drops across each resistor.