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Difference Between Electric Potential Between Two Points for JEE Main 2025

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Last updated date: 13th Jul 2024
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What is Electric Potential Between Two Points?

To explain electric potential between two points: Electric potential difference, often referred to as voltage, is a fundamental concept in the study of electricity. It is a key parameter that governs the behavior of electrical systems and plays a crucial role in the flow of electric charges and the functioning of electrical circuits. Understanding the concept of electric potential difference is essential for engineers, physicists, and anyone working with electrical systems.


Category:

JEE Main Difference Between

Content-Type:

Text, Images, Videos and PDF

Exam:

JEE Main

Topic Name:

Difference Between Electric Potential Between Two Points

Academic Session:

2025

Medium:

English Medium

Subject:

Mathematics

Available Material:

Chapter-wise Difference Between Topics


At its core, electric potential difference represents the difference in electric potential energy per unit charge between two points in an electrical system. It quantifies the work done in moving a positive test charge from one point to another. This potential difference is the driving force behind the flow of electric charges and establishes the direction and magnitude of electrical currents.


Where can we Find the Electrical Potential Difference?

Electric potential difference finds wide applications in various fields. In electrical circuits, it determines the flow of electric charges through conductors, resistors, and other components. It enables the transmission of electrical power from power plants to our homes and industries. Moreover, it is crucial for the functioning of electronic devices such as computers, smartphones, and household appliances.


Understanding electric potential difference allows us to analyse and design electrical circuits, evaluate the efficiency and performance of electrical systems, and troubleshoot electrical problems. It is a fundamental concept in the field of electrical engineering and forms the basis for many advanced topics, such as electric fields, capacitance, and electromotive force.


Defining Electric Potential

Electric potential, also called electric potential energy per unit charge, is a fundamental concept in the field of electricity. It describes the amount of potential electricity possessed by a positive test charge placed at a specific point in the electric field.


Imagine an electric field surrounding a charged object. The electric potential at a given point in this field gives the potential energy per unit charge that a positive test charge placed at that point would have. In simple terms, electric potential measures the amount of work that can be done on a positive test charge as it moves from a reference point (which is often taken to be infinite) to a specific point of interest in an electric field. The unit of electrical voltage is the volt (V), named after the Italian physicist Alessandro Volta. One volt equals one joule of electrical potential energy per coulomb of charge. With this unit we can quantify the magnitude of the electric potential at a given point in the electric field. 


More about Electrical Potential

Note that the electric potential is a scalar quantity, that is, it has only magnitude and no direction. However, it is closely related to the electric field, which is a vector quantity.


The electric field is responsible for creating the electric potential and these two concepts are related. The electric potential at a given point is affected by the charge distribution and the strength of the electric field in that area. Knowledge of electrical potential is essential for the analysis and study of electrical systems. It provides information about the behavior of charges in electric fields, the flow of current in circuits and the interactions between charged particles.


Defining Electric Potential Difference

Electric potential difference, also known as voltage, refers to the difference in electric potential between two points in an electrical system. It quantifies the change in electric potential energy per unit charge as one moves from one point to another. Electric potential difference is a fundamental concept in electricity and is measured in volts (V).


The electric potential difference is responsible for creating the driving force that allows electric charges to flow in a circuit. It represents the work done per unit charge in moving a positive test charge between the two points. The greater the electric potential difference between two points, the higher the driving force for the movement of charges and the larger the resulting electric current.


Measuring Electrical Potential Difference

To measure the electric potential difference, a device called a voltmeter is used. The voltmeter is connected across the two points of interest, and it measures the potential difference between them. It allows us to determine the voltage across various components in an electrical circuit and enables us to analyze the behavior and characteristics of the circuit.


Practical Applications of Electrical Potential Difference 

Electric potential difference plays a crucial role in various practical applications. It is essential for power distribution and transmission, enabling the efficient transfer of electrical energy over long distances. It is also vital in electronic devices, where different components require specific voltage levels for proper operation. Additionally, electric potential difference is utilized in electrical safety measures, such as grounding and insulation, to prevent electrical hazards.


Differences Between Electric Potential Difference and Electric Potential

Sl.No

Property

Electric Potential Difference

Electric Potential

1

Definition

Measure of energy transfer per unit charge between two points

Measure of electric potential energy per unit charge at a specific point

2

Role

Determines the flow of electric charges and current in a circuit

Describes the electric potential at a specific point in an electrical field

3

Measurement Technique

Measured using a voltmeter

Measured using an electrostatic voltmeter or by theoretical calculations


The above table describes some characteristics of electric potential between two points.


Summary

What is electric potential difference between two points? The concept of it in an electrical system is of paramount importance in understanding and analysing the behavior of electrical circuits, power transmission, and the functioning of electronic devices. Electric potential difference, commonly known as voltage, quantifies the difference in electric potential energy per unit charge between two points and serves as the driving force for the flow of electric charges.


By comprehending the concept of electric potential difference, engineers, scientists, and enthusiasts gain valuable insights into the behavior of electrical systems. It allows for the analysis of circuit performance, evaluation of power distribution efficiency, and proper functioning of electronic devices.

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FAQs on Difference Between Electric Potential Between Two Points for JEE Main 2025

1. What is the significance of electric potential difference?

Electric potential difference is essential for the flow of electric charges in electrical circuits. It provides the driving force that allows charges to move from areas of higher potential to areas of lower potential. This enables the establishment of electrical currents and the functioning of various electrical devices and systems.

2. How is electric potential difference measured?

Electric potential difference is measured using a device called a voltmeter. The voltmeter is connected across the two points of interest in an electrical system, and it provides a numerical value in volts (V) that represents the potential difference between those points.

3. Can electric potential difference exist without a complete circuit?

Yes, electric potential difference can exist between two points even without a complete circuit. It is the difference in electric potential between those points that drives the flow of charges. However, to sustain a continuous flow of current, a complete circuit path is required.

4. What factors affect the magnitude of electric potential difference?

The magnitude of electric potential difference is influenced by several factors. These include the difference in charge between the two points, the distance between the points, and the distribution and arrangement of charges in the electric field.

5. Can electric potential difference be negative?

Yes, electric potential difference can be negative. A negative potential difference indicates that the flow of electric charges is from a lower potential to a higher potential, contrary to the conventional direction. The sign of the potential difference depends on the direction of charge flow and the reference point chosen.