NEET2022Physics-Electrostatics
NEET 2022 Physics Capacitors MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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:
A
2.25 × 10⁻⁶ J
B
1.5 × 10⁻⁶ J
C
4.5 × 10⁻⁶ J
D
3.25 × 10⁻⁶ J
Correct Answer
Option B
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?