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Shane Macguire Grade: upto college level
        An air-filled parallel-plate capacitor is to be constructed which can store 12 μC of charge when operated at 1200 V. What can be the minimum plate area of the capacitor? The dielectric strength of air is 3 × 10^6 V/m.
3 years ago

Answers : (1)

Jitender Pal
askIITians Faculty
365 Points
										Sol. Q = 12 μc

V = 1200 V
v/d = 3 * ^10-6 v/m
d = v/(v/d) = 1200/3 * 10^-6 = 4 * 10^-4 m
c = Q/v = 12 * 10^-6/1200 = 10^-8 f
∴ C = ε base 0A/d = 10^-8 f
⇒ A = 10^-8 * d/ε base 0 = 10^-8 *4 * 10^-4/8.854 * 10^-4 0.45m^2
3 years ago
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