0
Why it is not correct to say that potential difference is the work done in moving unit charge between the point concerned?
Wiki User
∙ 14y ago
Voltage is defined as potential difference (units of volts).
Work is equivalent to power (over time), and its' unit is joules. Power is equivalent to the potential difference times the current flow. Without current flow, there is no power, so it is incorrect to define potential difference as work.
What I think you're implying is potential energy and potential difference are the same:
Potential energy of a rock can be increased by raising the rock into the air. The increase of potential energy of the rock is equivalent to the real work done to raise it higher into the air. This is a true statement.
Potential energy (joules) and potential difference (volts) are not equivalent, though, since potential differenence is not defined as work.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What is the difference between 1000kgs and 1000kg.which one is correct?
1000 kg is correct, no need to make it plural
What is the difference between ploughing and plowing?
Ploughing is the correct spelling, plowing is the US spelling.
What is the difference between error and problem?
Error-whenwe are doing something wrong......this is errer.....and How to correct it......is our problem.
What is 'electrical potential' - 'energy difference' or 'voltage'?
Electrical potential deals with moving a charge in a direction opposite to an electric field. So what we are actually dealing with is Potential Energy. This can be calculated by the equation of PE = QEd where Q is the charge of the particle, E is the electric field and d is the distance the charged particle has been moved. The units of all this ends up being Joules (J). Now, electric potential difference is another story. This is the work per unit charge. In this case the unit will be V (volts).
How many kinds of electric charge are there?
There are two. Positive + and Negative - Positive is carried by the proton and negative is carried by the electron. What is usually talked about when people talk about charge is electrical potential. At zero potential there are equal number of electrons and protons. But in the real world that seldom happens so electrical potential is correct the potential difference between the state of two objects. In other words which one has the most or least electrons compared to its number of protons. Since this is hard to count we are lucky that the excess one of the other creates an electrical field and we can measure the strength of the field as a measure of the charge. The most common device to do this is a voltmeter which measures the electrical potential difference between to conductors such as the ends of a battery. There are other devices to measure the magnitude of static electrical fields.
Why it is not correct to say that the potential difference is the work done in moving charge between the points concerned?
Voltage is defined as potential difference (units of volts). Work is equivalent to power (over time), and its' unit is joules. Power is equivalent to the potential difference times the current flow. Without current flow, there is no power, so it is incorrect to define potential difference as work. What I think you're implying is potential energy and potential difference are the same: Potential energy of a rock can be increased by raising the rock into the air. The increase of potential energy of the rock is equivalent to the real work done to raise it higher into the air. This is a true statement. Potential energy (joules) and potential difference (volts) are not equivalent, though, since potential differenence is not defined as work.
Which is the correct term for the movement of an electrical charge across a membrane?
Potential difference.
What is the difference between jewelry and jewellery?
The difference between jewelry and jewellery is correct versus incorrect spelling. "Jewelry" is the correct spelling.
Which is the correct course of action to take when you first experience a potential conflict with a coworker?
Discuss calmly and privately with the person why you are concerned or upset.
As approved or approved which is correct?
which is correct difference between as approved or approved
How many electrons are transferred between 2 points kept at a potential difference of 20 volt if 40 joule of work is done?
i do not know the answer of this question please tell me the correct answer of this question
What is the difference between in compliance with and in compliance to?
"In compliance with" is commonly used to denote adherence to rules or regulations, while "in compliance to" is less commonly used and may be considered less natural or grammatically correct in this context. It is recommended to use "in compliance with" for clarity and correctness in formal writing.
What is the difference between perfect elasticity?
That's not correct English.
What is the difference between you had eaten and you have eaten?
HAVE eaten is correct where as HAD eaten is not.
What is the difference between a rhombuses and a rectangle?
A rectangle is correct; a rhombuses is not.
What is the difference between potential difference and voltage difference?
To specifically answer the question, there is no such thing as 'voltage difference' because, by definition, 'voltage' means 'potential difference' -not 'potential'!You can compare 'potential' with height, and 'potential difference' with the difference in height.The height of an object depends upon from where you measure it. For example an object three-quarters of the way up a 1000 m mountain is +750 m from the base of the mountain, but -250 m from the top of the mountain. Note how we apply a positive or a negative sign to indicate whether we are measuring upwards or downwards.The same applies to potential. It's value depends upon from where it is measured. For example, two charged objects could have a potential of , say, +5 V with respect to earth (ground) and a potential of -15 V with respect to earth. But the potential difference between them will be +5 - (-15) = 20 V.Notice how, in the above example, we always show a positive or negative sign when we talk about potential, but we don't use these signs when we talk about a potential difference. Furthermore, it is important that we must ALWAYS specify the reference point when we describe potential -e.g. "What is the potential at point A, with respect to (say) earth?"Taking this further. It's important to know that the term 'voltage' means 'potential difference', and not 'potential'! It would be quite wrong to say that the 'voltage of an object is (say) -200 V with respect to earth'. The correct expression would be the 'potentialof an object is -200 V with respect to earth'.
Is potential difference can be positive negative or zero?
That is correct. Since potential difference is a difference, Vb - Va ,then you can have all three possibilities. The potential at a point, say Va, is itself a difference. It is the potential difference between point "a" and a second point "0" where the potential is choosen to be zero. This zero point is completely arbitrary , provided it does not lead to mathematical difficulties. Sometimes it is convienient to choose a zero location for potential and sometimes its not necessary. For example; suppose the potential difference between charged parallel plates a & b is Vb - Va = 10 volts. This would require that Vb > Va , but the actual values of Vb & Va need not be known. Then Va - Vb = - 10 volts. If one wants to choose point "a" as the zero point, then Vb = 10 v. Or if one wants to choose Vb as the zero point then Va = - 10 v. Or if one wants to choose midway between the plates as the zero point then Vb = 5v & Va = - 5v.
