Home › UP Board Class 12 › physics › Electrostatic Potential and Capacitance › A 5 µF capacitor is charged to 200 V. The energy…
A 5 µF capacitor is charged to 200 V. The energy stored in it is
A{'text': '0.1 J', 'label': 'A'}
B{'text': '0.05 J', 'label': 'B'}
C{'text': '1.0 J', 'label': 'C'}
D{'text': '0.5 J', 'label': 'D'}
Answer & Solution
Correct answer: A. {'text': '0.1 J', 'label': 'A'}
1. U = ½ C V².
2. U = 0.5 × 5 × 10⁻⁶ × (200)² = 0.5 × 5 × 10⁻⁶ × 4 × 10⁴.
3. U = 10⁻¹ = 0.1 J.
_Source: NCERT Class 12 Physics Part I, Ch 2 §2.15_
Related questions
Two concentric conducting spherical shells have radii a and b (a < b) and carry charges +QCapacitance of a parallel-plate capacitor (area A, separation d) when a dielectric slab ofFour equal point charges q sit at the corners of a square of side d. The work needed to asAn isolated conducting sphere of radius R carries a charge Q. The electric potential at itTwo identical capacitors, each of capacitance C, are charged to potentials V and 2V respecA parallel-plate capacitor of capacitance C is charged to a potential V by a battery, thenAn electric dipole of moment p is placed in a uniform field E. The work done to rotate it Two point charges +3 × 10⁻⁸ C and −2 × 10⁻⁸ C are placed 15 cm apart on a line. Taking V(∞