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Chapter 29: Q. 3 (page 796)

The wire is broken on the right side of the circuit in FIGURE Q28.3. What is the potential difference V1-V2between points 1and2? Explain.

Short Answer

Expert verified

The potential difference between the two points is given by∆V12=3V

Step by step solution

01

Given information and formula used 

Given :

The wire is broken on the right side of the circuit in the given figure :

Theory used :

Ohm's law, description of the relationship between current, voltage, and resistance. The amount of steady current through a large number of materials is directly proportional to the potential difference, or voltage, across the materials.

02

Determining the potential difference between points 1 and 2

The resistor creates a voltage drop for the battery when the wire is connected, and the current flowing through the resistance is determined by Ohm's equation as I=3V3Ω=1A

The current through the resistance is zero, that isI=0when the wire is broken, and there is no voltage drop for the battery.

Hence the two points 1and2have the same potential difference as the battery. So

∆V12=3V

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