Solve Electric Potential - Find Charge (9e-05 J)

Click For Summary
SUMMARY

The discussion centers on calculating the charge when moving from a higher electric potential of 284 V to a lower potential of 83 V, requiring 9e-05 J of work. The formula used is Uel = qV, leading to the rearrangement q = Uel/V. The calculated charge is 4.478 x 10^-7 C, and it is concluded that the charge must be negative due to the positive work done in moving from high to low potential.

PREREQUISITES
  • Understanding of electric potential and work in electrostatics
  • Familiarity with the formula Uel = qV
  • Basic knowledge of charge polarity and its implications
  • Ability to perform calculations involving scientific notation
NEXT STEPS
  • Study the relationship between electric potential and electric field strength
  • Learn about the implications of charge polarity in electric circuits
  • Explore advanced electrostatics concepts, such as capacitance
  • Investigate the principles of energy conservation in electric fields
USEFUL FOR

Students in physics, particularly those studying electromagnetism, as well as educators and anyone seeking to understand the relationship between electric potential and charge calculations.

BuBbLeS01
Messages
602
Reaction score
0

Homework Statement


Moving a charge from point A, where the potential is 284 V, to point B, where the potential is 83 V, takes 9e-05 J of work. What is the value of the charge?


Homework Equations





The Attempt at a Solution


I know this is a very easy problem but I am not getting the right answer...
I thought it was just...
Uel = qV
q = Uel/V
q = 9x10^-5 / (284-83) = 4.478 x 10^-7 C
 
Physics news on Phys.org
If it takes positive work to move the charge from high potential to low potential, then the charge must be negative.
 

Similar threads

Replies
5
Views
1K
  • · Replies 7 ·
Replies
7
Views
1K
Replies
1
Views
3K
Replies
8
Views
2K
Replies
2
Views
778
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 22 ·
Replies
22
Views
4K
  • · Replies 16 ·
Replies
16
Views
2K
Replies
1
Views
2K
  • · Replies 23 ·
Replies
23
Views
2K