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A capacitor is to be designed to operate...

A capacitor is to be designed to operate, with constant capacitance, even when temperature varies.The distance between plates is adjusted by spacer to compensate temperature effect. Let `alpha_(1) and alpha_(2)` be the coefficient of thermal expansion of plate and spacer respectively. Find the ratio of `alpha_2/alpha_1` . So that no change in capacitance of capacitor with change in temperature.

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