Electric Potential and Point Charges: Exploring the Relationship

In summary, the conversation discusses the concept of electric potential and how it relates to two isolated point charges. It is determined that electric potential is a scalar quantity and that the potential at point P can be calculated using a simple formula. The conversation also addresses the implications of having a point charge at B and the resulting potential at P being zero.
  • #1
WeiLoong
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Homework Statement


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Homework Equations


Electric potential

The Attempt at a Solution


Is electric potential a vector quantity?
So that mean both charges product electric potential and result in zero at P?
How should i start for question 17a?
 
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  • #2
WeiLoong said:
Is electric potential a vector quantity?
No. It is scalar.
 
  • #3
Electric potential is a scalar. Now, what does it mean that potential at P is zero? You have two isolated point charges, that each one produces an electric field around it. So, how can the potential at P be zero? Answering that, you can immediately see that using this fact and a simple formula, you can calculate point charge at B.
 
  • #4
QuantumQuest said:
Electric potential is a scalar. Now, what does it mean that potential at P is zero? You have two isolated point charges, that each one produces an electric field around it. So, how can the potential at P be zero? Answering that, you can immediately see that using this fact and a simple formula, you can calculate point charge at B.

That mean kq/r+kq/r=0 something like that?
 
  • #5
WeiLoong said:
That mean kq/r+kq/r=0 something like that?
What would be the potential at point P, if you didn't have point charge at B? But you have this point charge at B and potential at P is zero. So, you have a zero from two scalars (V). What does this imply for the second potential (i.e. regarding B)?
 
Last edited:

1. What is an electric potential problem?

An electric potential problem refers to a scenario in which there is a difference in electrical potential between two points in a system, causing a flow of electric charges between them.

2. How is electric potential different from electric field?

Electric potential is a scalar quantity that represents the potential energy per unit charge at a point in an electric field, while electric field is a vector quantity that represents the force per unit charge at a point in an electric field.

3. What is the relationship between electric potential and electric potential energy?

Electric potential energy is the potential energy that a charged particle has due to its position in an electric field, while electric potential is the potential energy per unit charge at a point in an electric field. The relationship between the two is given by the equation V = U/q, where V is electric potential, U is electric potential energy, and q is the charge of the particle.

4. How is electric potential calculated?

Electric potential can be calculated using the equation V = kq/r, where V is electric potential, k is a constant, q is the charge of the particle, and r is the distance between the particle and the point where electric potential is being calculated.

5. What are some real-life applications of electric potential problems?

Electric potential problems have many real-life applications, including in the design of electrical circuits, the functioning of batteries and generators, and the movement of charged particles in medical equipment such as MRI machines.

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