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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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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In a region, the potential is represented by V(x,y,z)=6x-8xy-8y+6yz, where V
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- A boat which has a speed of 5 kmh⁻¹ in still water crosses river of width 1 km long
- To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA
- A galvanometer of resistance 50Ω is connected to a battery of 3 V along with a resistance
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Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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