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NEET 2011 (AIPMT, Prelims) · Energy Stored & Force between Plates

Energy Stored & Force between Plates question from NEET 2011 (AIPMT, Prelims)

Q33NEET 2011 · AIPMT · PRELIMSEasy

Energy Stored & Force between Plates

A parallel plate capacitor has 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

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Answer: (c)

Energy density $u = \frac{1}{2}\varepsilon_0 E^2$ .
Volume between plates $= Ad$ , so $U = \frac{1}{2}\varepsilon_0 E^2 Ad$ .
So the answer is (c) $\frac{1}{2}\varepsilon_0 E^2 Ad$ .

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