- #1
amaresh92
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is it true that the voltage at a point means the quantity of charge at that point?if not then what is voltage?
thanks
thanks
Is it true that the voltage at a point means the quantity of charge at
In summary, voltage is a difference in electric potential between two points, which is also the difference in potential energy for a unit charge. This means that the work done moving a charge through a voltage difference is equal to the change in potential energy. Electric potential and voltage are essentially the same thing, as they both refer to the difference in potential energy per electric charge.
- #2
tiny-tim
Science Advisor
Homework Helper
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hi amaresh92! 
no, voltage is a difference between two points …
it's the difference in electric potential between two points
(and since electric potential = potential energy per charge, that means it's the difference in potential energy between two points, for a unit charge)
from the work energy theorem that means that the work done moving a charge q through a voltage difference V is the change in potential energy: Vq
amaresh92 said:
no, voltage is a difference between two points …
it's the difference in electric potential between two points
(and since electric potential = potential energy per charge, that means it's the difference in potential energy between two points, for a unit charge)
from the work energy theorem that means that the work done moving a charge q through a voltage difference V is the change in potential energy: Vq
- #3
amaresh92
- 163
- 0
tiny-tim said:hi amaresh92!
no, voltage is a difference between two points …
it's the difference in electric potential between two points
(and since electric potential = potential energy per charge, that means it's the difference in potential energy between two points, for a unit charge)
from the work energy theorem that means that the work done moving a charge q through a voltage difference V is the change in potential energy: Vq
i am not able to understand the term electric potential?Is electric potential and voltage means same?
thanks.
- #4
tiny-tim
Science Advisor
Homework Helper
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amaresh92 said:
yes, voltage = potential difference = difference in electric potential = difference in potential energy per electric charge
1. Is voltage and charge the same thing?
No, voltage and charge are not the same thing. Voltage is a measure of the potential difference between two points, while charge is a measure of the amount of electric charge present at a point. They are related, as voltage is directly proportional to the charge, but they are not interchangeable.
2. How is voltage related to charge?
Voltage is directly proportional to charge. This means that as the amount of charge increases, the voltage also increases. The relationship between voltage and charge can be expressed by the equation V = Q/C, where V is voltage, Q is charge, and C is capacitance.
3. Can voltage exist without charge?
Yes, voltage can exist without charge. Voltage is a measure of the potential difference between two points, and it is possible for there to be a potential difference without the presence of electric charge. This can occur in situations where there is a buildup of opposite charges on either side of a barrier, creating a potential difference but not a charge imbalance.
4. Does the voltage at a point represent the total charge at that point?
No, the voltage at a point does not necessarily represent the total charge at that point. Voltage is a measure of the potential difference between two points, and the total charge at a point also depends on the distribution of charge in the surrounding area. It is possible for there to be a high voltage at a point with a relatively small amount of charge, or a low voltage at a point with a large amount of charge.
5. What units are used to measure voltage and charge?
Voltage is typically measured in volts (V), while charge is measured in coulombs (C). However, other units such as kilovolts (kV) and microcoulombs (μC) may also be used depending on the magnitude of the values being measured.
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