- #1
Kaguro
- 221
- 57
- Homework Statement
- A parallel-plate capacitor is connected to a cell. Its plates A and B have charges +Q and -Q respectively. A third place C, identical to A and B and having charge +Q is inserted midway in between A and B,parallel to them. Which of the following are correct?
(1)The charge on the inner face of B is now -3Q/2
(2)There is no change in the potential difference between A and B.
(3)The potential difference between A and C is one-third of the potential difference between B and C.
(4) The charge on the inner face of A is now Q/2.
This is a Multiple Select Question so more than one option maybe correct.
- Relevant Equations
- Q=CV maybe for the capacitor...
Potential depends on the charge contained by the conducting plate. So the plate C should change the electric field and hence potential on both plates A and B. This should change the absolute value of potential,but since A and B are still connected to that cell, I think the potential difference between them shouldn't change. So maybe (2) is correct. What do you think?