Why would electric potential be zero?

Asia Zboncak asked a question: Why would electric potential be zero?
Asked By: Asia Zboncak
Date created: Fri, Jul 9, 2021 4:24 PM

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Those who are looking for an answer to the question «Why would electric potential be zero?» often ask the following questions:

👉 Can electric potential zero?

Yes, electric potential can be zero at a point even when the electric field is not zero at that point… At the midpoint of the charges of the electric dipole, the electric field due to the charges is non zero, but the electric potential is zero.

👉 Zero electric potential but non-zero electric field?

Hence the physical significance of a point where the electric field is non-zero, is that the electric field is non-zero, and that the potential is zero there has no physical significance, because the point-values of the potential are not unique.

👉 Can electric potential be zero?

Yes, electric potential can be zero at a point even when the electric field is not zero at that point. Considering the case of the electric dipole will help us understand this concept. At the midpoint of the charges of the electric dipole, the electric field due to the charges is non zero, but the electric potential is zero.

9 other answers

Why is electric potential 0 in this case? On a test, we had a question where there are 4 point charges at the vertices of a square. The 2 charges at the upper vertices have charges of +q and the 2 charges at the lower vertices have charges of -q. The magnitude of the charges are equal. According to the answer sheet, the electric potential is 0 ...

That is why it is considered sensible to select a point for zero potential energy as being located so far away that it is beyond the gravitational pull of ANY object in the universe, i.e. at a distance of ∞. This is exactly the reason why we take a point located at a distance of ∞ in electrostatics too.

Q is charge. Earth is supposed to have infinite capacitance (To make this point clear, take example os sea. What is its capacitance? Of course, infinity. Adding or removing gallons of water wouldn't affect it) We have, Q/V = C. Putting C = infinity = 1/0. Thus electric potential of the Earth comes out to be 0.

Where is the electric potential (with respect to infinity) equal to zero? Yes, the electric field is a vector and the electric potential is a scalar — so you would think that the question about...

In the example given in the question, the potential is zero in the mid-point, but it changes quite rapidly when one moves towards one charge or the other. So, although the electric potential is zero, the field is nonzero. Let me try to explain by analogy. The case of a car on a road is analogous to this. The elevation of the car from sea level determines is analogous to the electric potential (it is the gravitational potential), and the force on the car is analogous to the electric field.

The electric potential at infinity is assumed to be zero. In electrodynamics, when time-varying fields are present, the electric field cannot be expressed only in terms of a scalar potential. Instead, the electric field can be expressed in terms of both the scalar electric potential and the magnetic vector potential.

So there are an infinite number of places that you can put the -1 C charge to make the potential zero: these places form a circle of radius 1 cmcentered about the point. The freedom of not worrying about direction is because potential is a scalar, that is, just a number. The +3 C charge creates a potential (just a number) at the point.

If the electric field is high magnitude, the potential is changing quickly with a change in position. If its magnitude is small, the potential is changing slowly with a change in position. If the electric field is zero, the potential is either at a maximum or a minimum.

Youre talking about masses in the opening sentence - there wont be a point where the potential is zero. There will be a point where the field strngth is zero . Th electric field strength is related to the GRADIENT of the potential. ie whenever the potential is max or min, the field strength and hence the resultant force is zero. 0.

Your Answer

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Yes, the electric field is a vector and the electric potential is a scalar — so you would think that the question about potential might be simpler, but not so. If you only have two electric...

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Electric potential and field strength = zero ?

Youre talking about masses in the opening sentence - there wont be a point where the potential is zero. There will be a point where the field strngth is zero . Th electric field strength is related to the GRADIENT of the potential. ie whenever the potential is max or min, the field strength and hence the resultant force is zero. 0.

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When electric potential will be zero?

What does it mean if electric potential is 0? Being infinitely far away from other charges just means the electric potential will be zero. If you move towards a positive charge, the potential will increase from 0 to some positive value getting more positive as you get closer to the positive charge. Why is electric potential zero opposite charges?

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When is electric potential energy zero?

  • At a point midway between two equal and opposite charges, the electric potential is zero but the electric field is not zero. The electric potential at a point is said to be one volt if one joule of work is done in moving one Coloumb of the charge against the electric field.

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Why is electric potential zero inside?

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Why is the electric potential zero?

Clearly, it feels equal attraction and repulsion from the positive and negative charges, and hence the net force along the line is zero. The basic definition of work done is force times distance. Therefore the work done in moving along the line is zero. Therefore the potential difference b/w infinity and any point on the line is zero.

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When electric field is zero why isn't potential zero?

In those equations what is V is the potential gradient/difference and not the electric potential. The electric potential is a scalar quantity. Even if in an area the electric potential is non-zero but constant there won't be an electric field generated - so in this area the electric field strength is zero but the electric potential is not zero.

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Can electric potential have a zero value?

Yes, electric potential can be zero at a point even when the electric field is not zero at that point… At the midpoint of the charges of the electric dipole, the electric field due to the charges is non zero, but the electric potential is zero.

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Find where the electric potential is zero?

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When does the electric potential equal zero?

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When is electric field and potential zero?

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When is electric potential energy zero called?

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When is electric potential energy zero made?

At a point midway between two equal and opposite charges, the electric potential is zero but the electric field is not zero. The electric potential at a point is said to be one volt if one joule of work is done in moving one Coloumb of the charge against the electric field.

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