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NEET 2008 (AIPMT) · Energy Stored & Force between Plates

Energy Stored & Force between Plates question from NEET 2008 (AIPMT)

Q34NEET 2008 · AIPMTEasy

Energy Stored & Force between Plates

The energy required to charge a parallel plate condenser of plate separation $d$ and plate area of cross-section $A$ such that the uniform electric field between the plates is $E$ , is

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Answer: (b)

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

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