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A parallel plate condenser has a uniform electric field E(V/m) in the space between the plates. If the distance between the plates is d(m) and area of each plate is A(m²) the energy (joules) stored in the condenser is
Options
(a) E² Ad / ?￢ﾂﾀ
(b) 1/2 ?￢ﾂﾀ E²
(c) ?￢ﾂﾀ E Ad
(d) 1/2 ?￢ﾂﾀ E² Ad
Correct Answer:
1/2 ?￢ﾂﾀ E² Ad
Explanation:
U = 1/2 CV²
U = 1/2 (A ?￢ﾂﾀ / d) (Ed)²
= 1/2 ?￢ﾂﾀ E² Ad
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Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A boat taken 2h to travel 8km and back in still water.If the velocity of water 4 km/h
- Element ²³⁴U has 92 protons and 234 nucleons in its nucleus. It decays by
- A bullet of mass 0.05 kg moving with a speed of 80 m/s enters a wooden
- A particle of mass 1.96×10⁻¹⁵ kg is kept in equilibrium between two horizontal metal
- The ratio of specific heats Cp/Cv=γ in terms of degrees of freedom (n) is given by
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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