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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
- A 70 kg man stands in contact against the inner wall of a hollow cylindrical drum
- A cylindrical tank is filled with water to a level of 3m. A hole is opened at a height
- A piece of iron is heated in a flame. It first comes dull red then becomes reddish
- A bar magnet with magnetic moment 2.5×10³ JT⁻¹ is rotating in horizontal plane
- A solid cylinder of mass 50kg and radius 0.5 m is, free to rotate about the horizontal axis
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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