Moving through the loop in the direction of the current:
6.0 V - 4.0 V + ΔV - 3.0 V = 0
ΔV = 1 V
Although Kirchhoff's junction law is needed only when there are one or more junctions in a circuit. Kirchhoff's loop law is used for analyzing any type of circuit, as explained in the following tactics box.
What is the absolute value of the potential difference |ΔV| across the unknown element in the circuit shown in the figure. Express your answer in volts.
(b) Is the unknown element a battery or a resistor?
A. the unknown element is a battery.
B. The unknown element is a resistor.
C. Whether it is a battery or a resistor cannot be determined.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Kirchhoff's Loop Rule concept. You can view video lessons to learn Kirchhoff's Loop Rule. Or if you need more Kirchhoff's Loop Rule practice, you can also practice Kirchhoff's Loop Rule practice problems.
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Based on our data, we think this problem is relevant for Professor Gueye's class at MSU.