An air-filled parallel-plate capacitor has plates of area 2.40 cm2 separated by 2.50 mm. The capacitor is connected to a 21.0-V battery. (a) Find the value of its capacitance. pF (b) What is the charge on the capacitor? pC (c) What is the magnitude of the uniform electric field between the plates?
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An air-filled parallel-plate capacitor has plates of area 2.40 cm2 separated by 2.50 mm. The capacitor is connected to a 21.0-V battery.
pF
(b) What is the charge on the capacitor?
pC
(c) What is the magnitude of the uniform electric field between the plates?
Solution:
Given:
A = area of the plates = 2.40 cm2 = 2.40 x 10-4 m2
d = spacing between the plates = 2.50 mm = 2.50 x 10-3 m
V = voltage across the capacitor = 21.0 V
ε0 = permittivity of free space = 8.85 x 10-12 F/m
C = capacitance of the capacitor in pF = ?
Q = charge on the capacitor in pC = ?
E = magnitude of electric field between the plates = ?
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