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A coil of resistance 10 Ω and an inductance 5 H is connected to a 100 volt battery. The energy stored in the coil is
Options
(a) 250 erg
(b) 250 J
(c) 125 erg
(d) 125 J
Correct Answer:
250 J
Explanation:
Energy U = (1/2) LI²
= (1/2) × 5 × (100/10)² = 250 J
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life
- An engine has an efficiency of 1/6. When the temperature of sink is reduced
- A 200 W sodium street lamp emits yellow light of wavelength 0.6 µm
- The young’s modulus of steel is twice that of brass. Two wires of same length
- An artificial satellite is revolving round the earth in a circular orbit. Its velocity
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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