When the knob of a certain radio tuning capacitor is turned, Physics

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When the knob of a certain radio tuning capacitor is turned

When the knob of a certain radio tuning capacitor is turned, the effective area of the plates in the interleaved position is reduced from 40 cm^2 to 10cm^2.

A. What is the ratio of initial to the final capacitance?

B. If the initial capacitance is 1 uF, what is the plate seperation?

C. What is the new capacitance when the area is 10 cm^2?

D. If the radio is powered by a 9 volt battery, what are the initial and final charges on the plates?

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Physics: When the knob of a certain radio tuning capacitor is turned

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Reference No:- TGS0579696

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