A parallel-plate air-filled capacitor having area 39 cm 2 and plate spacing 2.0
ID: 1724856 • Letter: A
Question
A parallel-plate air-filled capacitor having area 39 cm2 and plate spacing 2.0 mm is charged to a potential difference of300 V. Find the following values. (a) the capacitance1 pF
(b) the magnitude of the charge on each plate
2 nC
(c) the stored energy
3 µJ
(d) the electric field between the plates
4 V/m
(e) the energy density between the plates
5 J/m3 (a) the capacitance
1 pF
(b) the magnitude of the charge on each plate
2 nC
(c) the stored energy
3 µJ
(d) the electric field between the plates
4 V/m
(e) the energy density between the plates
5 J/m3
Explanation / Answer
a) 17.3 b) 5.18 c) 0.777 d) 1.5*105 e) 0.0996