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MHT CET 2022 (11 Aug, Shift 2) · Energy Stored & Force between Plates

Energy Stored & Force between Plates question from MHT CET 2022 (11 Aug, Shift 2)

Q19MHT CET 2022 · 11 AUG · SHIFT 2Easy

Energy Stored & Force between Plates

A parallel plate air capacitor has a uniform electric field 'E' in the space between the plates. Area of each plate is A and the distance between the plates is ' $d$ '. The energy stored in the capacitor is $[\varepsilon_0 =$ permittivity of free space)

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Answer: (b)

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 (b) $\frac{1}{2}\varepsilon_0 E^2 Ad$ .

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