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A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy stored is
Options
(a) 25×10⁵ joule
(b) 25 joule
(c) 25×10 erg
(d) 25×10³ erg
Correct Answer:
25×10³ erg
Explanation:
Energy = (1/2) CV² = (1/2) × (2 × 10⁻⁶) × (50)²
= (2 × 10⁻⁶ × 2500) / 2 = 2500 × 10⁻⁶ J
Energy = 2500 × 10⁻⁶ × 10⁷ = 25 × 10³ erg
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Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Energy stored in the coil of a self inductance 40 mH carrying a steady current of 2A
- A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined
- A meter stick of mass 400 g is pivoted at one end and displaced through an angle 60°.
- The oscillation of a body on a smooth horizontal surface is represented by the equation
- For the radioactive nuclei that undergo either α or β decay, which one
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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