Register to reply 
Electric Field Question 
Share this thread: 
#1
Dec1712, 08:25 PM

P: 25

For the equation ε=ΔV/r, does this work only between 2 parallel plates or would it work for point charges as well?



#2
Dec1812, 05:38 AM

P: 3,109



#3
Dec1812, 07:25 AM

P: 72

I love Electrostatics <3



#4
Dec1812, 10:26 AM

P: 886

Electric Field Question
Do you know calculus? Your equation seems to be another way of writing [itex]E = \Delta V/\Delta r[/itex], which is only an approximation. The correct value is gotten by taking the limit as Delta goes to 0. Then you get:
[itex]E=\nabla V[/itex] In the special case of infinite parallel plate, they give the same answer, but for a curved E field you get a more accurate answer for smaller step size. 


Register to reply 
Related Discussions  
Electric Potential / Electric Field Question  Introductory Physics Homework  1  
Question about Electric Field Strength and Electric Potential  Introductory Physics Homework  1  
HELP A question on electricity (electric field and electric potential)  Introductory Physics Homework  11  
Electromagnetic Waves Question, regarding Magnetic Field and Electric Field  Introductory Physics Homework  25  
Question about ELectric field and electric potential  Introductory Physics Homework  3 