Electrostatics 5 Question 33
35. A parallel plate capacitor of capacitance is connected to a battery and is charged to a potential difference . Another capacitor of capacitance is similarly charged to a potential difference . The charging battery is now disconnected and the capacitors are connected in parallel to each other in such a way that the positive terminal of one is connected to the negative terminal of the other. The final energy of the configuration is
(a) zero
(b)
(c)
(d)
Show Answer
Answer:
Correct Answer: 35. (b)
Solution:
- The diagramatic representation of given problem is shown in figure.
The net charge shared between the two capacitors is
The two capacitors will have the same potential, say
The net capacitance of the parallel combination of the two capacitors will be
The potential difference across the capacitors will be
The electrostatic energy of the capacitors will be