Kirchhoff's Loop Rule Video Lessons

Concept

# Problem: 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.(a)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.

###### FREE Expert Solution

(a)

Moving through the loop in the direction of the current:

6.0 V - 4.0 V + ΔV - 3.0 V = 0

ΔV = 1 V

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###### Problem Details

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.

(a)

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.