NEET 2022 Physics Capacitors MCQ Question
A capacitor of capacitance C = 900 pF is charged fully by 100 V battery B as shown in figure (a). Then it is disconnected from the battery and connected to another uncharged capacitor of capacitance C = 900 pF as shown in figure (b). The electrostatic energy stored by the system (b) is:
2.25 × 10⁻⁶ J
1.5 × 10⁻⁶ J
4.5 × 10⁻⁶ J
3.25 × 10⁻⁶ J
Correct Answer
Detailed Explanation
When the charged capacitor is connected to an uncharged capacitor of equal capacitance, the total energy is halved due to redistribution of charge. The initial energy was 4.5 × 10⁻⁶ J, so the final energy is 1.5 × 10⁻⁶ J.
Found an issue with this question?
Related Questions
More from Electrostatics
A conducting sphere of radius R carrying charge Q lies inside an uncharged conducting shell of radius 2R. If they are joined by a metal wire, the amou...
Assertion : Electric potential of earth is taken zero. Reason : No electric field exists on earth surface.
The equivalent capacitance of the system shown in the following circuit is: