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A parallel plate capacitor as a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the energy stored in the capacitor is:
Options
(a) 1/2 ?¬ツタ E²
(b) E² Ad / ?¬ツタ
(c) 1/2 ?¬ツタ E² Ad
(d) ?¬ツタ E Ad
Correct Answer:
1/2 ?¬ツタ E² Ad
Explanation:
The energy stored by capacitor U = 1/2 CV²
…(i)
V is the p.d. between two plates of the capacitor.
The capacitance of the parallel plate capacitor V = E.d. C = A ?¬ツタ / d
Substituting the value of C in equation (i)
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
- If an electron and a positron annihilate, the energy released is
- The half life of a radioactive isotope ‘X’ is 20 years. It decays to another element Y
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- A tuning fork vibrates with 2 beats in 0.04 second. The frequency of the fork is
- If the image formed by a convex mirror of focal length 30 cm is a quarter of the size
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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