STANDARDPhysics-Electrostatics
STANDARD Physics Capacitance MCQ Question
Type: MCQ-numerical-Medium
A capacitor of capacitance 700 pF is charged by 100 V battery. The electrostatic energy stored by the capacitor is
A
2.5 × 10⁻¹² J
B
3.5 × 10⁻⁶ J
C
2.5 × 10⁻¹² J
D
3.2 × 10⁻⁸ J
Correct Answer
Option B
Detailed Explanation
The energy stored in a capacitor is given by the formula U = 1/2 CV². Substituting C = 700 × 10⁻¹² F and V = 100 V, we get U = 1/2 × 700 × 10⁻¹² × (100)² = 3.5 × 10⁻⁶ J.
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