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Potential & Potential Difference Video Lecture | Crash Course: Class 10

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FAQs on Potential & Potential Difference Video Lecture - Crash Course: Class 10

1. What is potential difference?
Ans. Potential difference, also known as voltage, is the difference in electric potential energy between two points in an electric circuit. It is the driving force that pushes electric charges through a circuit.
2. How is potential difference measured?
Ans. Potential difference is measured using a device called a voltmeter. The voltmeter is connected in parallel to the circuit or across the component for which the potential difference needs to be measured. It provides a numerical value in volts (V) indicating the potential difference between the two points.
3. What is the unit of potential difference?
Ans. The unit of potential difference is the volt (V). One volt is equal to one joule of energy per coulomb of charge. It is named after the Italian physicist Alessandro Volta, who invented the voltaic pile, the first electrical battery.
4. How does potential difference affect the flow of electric current?
Ans. Potential difference plays a crucial role in the flow of electric current. A higher potential difference across a circuit or component leads to a greater flow of electric current. This is due to the fact that a higher potential difference provides more energy to the electric charges, allowing them to overcome the resistance in the circuit and move more easily.
5. What is the relationship between potential difference and electric power?
Ans. The relationship between potential difference and electric power is given by the equation P = IV, where P represents power, I represents electric current, and V represents potential difference. This equation shows that the power consumed or delivered by an electrical device is directly proportional to the product of the current and potential difference.
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