NCERT Solution for Class 10 Science Chapter 12
Electricity
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-202
Questions No-2
What is meant by saying that the potential difference between two points is 1 V?
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When 1 J of work is required to move a charge of 1 C from one point to another, then it is said that the potential difference between the two points is 1 V.
V=W/Q
1 V = 1 J/1 C
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The potential difference between two points is said to be 1 volt if 1 joule of work is done in moving 1 coulomb of electric charge from one point to the other.
This means 1 joule of work is done to move a charge of 1 coulomb between two points.
When we say that the potential difference between two points is 1 volt (1 V), it means that 1 joule of energy is required to move 1 coulomb of electric charge from one point to the other. In other words, a potential difference of 1 volt exists when 1 coulomb of charge experiences an energy change of 1 joule.
Mathematically, the potential difference (V) between two points is defined as the work done (W) in moving a positive test charge (q) between the points, divided by the magnitude of the charge:
V = W/q
In the International System of Units (SI), the unit of potential difference is the volt, and it is denoted by the symbol V. So, if the potential difference between two points is 1 V, it means that moving 1 coulomb of charge between those points requires 1 joule of energy.