Potential and field at two electric plates

AI Thread Summary
The discussion centers on the electric potential and field between two plates, confirming that work is required to move a positive test charge against the electric field from one plate to another. The equation V=kq/r is deemed irrelevant to the question, as it pertains to absolute potential rather than the specific scenario discussed. It is noted that the potential at the midpoint between the positive and negative plates is zero. The participants agree that the other answers provided are incorrect. Overall, the conversation emphasizes the relationship between electric potential, work, and the behavior of charges in an electric field.
kirby2
Messages
42
Reaction score
0
fdsfds sdfs
 
Last edited:
Physics news on Phys.org
Yes on both A and C. My explanation for A would be that work needs to be done to push a positive test charge from B to A against the force of the electric field. Your V=kq/r is obscure (unrelated to this question) because it is the absolute potential or work/charge for moving a charge from infinite distance into a position that is distance r away from charge q. It does tell you that the potential midway between the positive and negative plates is zero, though.
 
and the other answers are wrong, correct?
 
Correct.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Two different dielectrics between parallel-plate capacitor
Replies
6
Views
2K
Electric field at a point close to the centre of a conducting plate
Replies
7
Views
2K
Finding electric field between two conducting plates using Gauss' law
Replies
4
Views
2K
Polarities of capacitor plates in a complex circuit
Replies
14
Views
2K
Earthing of two parallel conducting plates
Replies
11
Views
1K
Understanding Electric Field of Positive & Negative Plates
Replies
2
Views
1K
Why does electric potential energy increase if you move against the field?
Replies
6
Views
1K
Electric field between two parallel plates
2
Replies
58
Views
5K
Charge upon a parallel plate capacitor
Replies
18
Views
3K
Electric fields of charged plates
Replies
6
Views
1K

Hot Threads

Recent Insights

Back
Top