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I have an ideal, air-filed, parallel plate capacitor that has a charge of magnitude 25 muC when the voltage across et is 4.0 V.

(a) What is the value of the capacitance?

(b) Suppose that I double the voltage. What is the capacitance now?

(C) Starting with the original voltage, I now insert a dielectric that completely fills the space between the parallel plate. The dielectric constant is 3.0. What is the capacitance now?

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