Electric potential and electric potential energy concept questions

  • Thread starter j.frank52
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Hello. This is my first post! Thanks in advance for any help given.

Homework Statement



A constant electric field is in the positive X direction as shown in the diagram below. Also shown are two paths through which a charge can move from point A to point C. In the first path path the charge moves parallel to the Y-axis to B and then parallel to the X-axis to C. In the second path, the charge moves directly from A to C.

VJe0M.png


Select greater than, less than or equal to for the following statements.

1. The electric potential at point A is ___________ the electric potential at point B.

2. The work done on a -17.0 C charge moved along the first path is __________ the work done on a -17.0 C charge moved along the second path.

3. The electric potential energy of a -17.0 C charge at point B is ___________ the electric potential energy of a -17.0 C charge at point C.


Homework Equations



W=Fd
V=U/q

The Attempt at a Solution



1. For this I put equal to because the A and B are on the same equipotential surface.

2. For this I put equal to because work is path independent.

3. For this one I'm unsure how to explain in terms of equations or concepts. I have multiple tries to guess and get the right answer, but I wish to know of how I can actually get to the right choice for this one. Any suggestions or hints?
 

Answers and Replies

  • #2
Andrew Mason
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3. For this one I'm unsure how to explain in terms of equations or concepts. I have multiple tries to guess and get the right answer, but I wish to know of how I can actually get to the right choice for this one. Any suggestions or hints?
Is there a potential difference between B and C? Which direction is the force on a negative charge?

AM
 
  • #3
ehild
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What is the definition of electric potential? How are work of the electric field and potential difference related?

ehild
 
  • #4
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Thanks!
 

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