Two 12.0-cm-diameter electrodes 0.65 cm apart form a parallel-plate capacitor. T

Question

Two 12.0-cm-diameter electrodes 0.65 cm apart form a parallel-plate capacitor. The electrodes are attached by metal wires to the terminals of a 15 V battery Part D What is the charge on each electrode after insulating handles are used to pull the electrodes away from each other until they are 1.4 cm apart? The electrodes remain connected to the battery during this process Enter your answers separated by a comma. Express each answer using three significant figures. View Available Hint(s) Hint 1. What Stays the Same The battery stays connected, so which of the quantities that you've already calculated have the same value? The amount of charge on each plate The electric field between the plates The voltage across the plates The capacitance revious Answers Correct In this problem, you'll have to redo your calculations for part A and B Q1 , Q2 =

Explanation / Answer

(D) electrode remains connected to battery.

so voltage will not change.

C = e0 A / d

C1 = (8.854 x 10^-12)(pi 0.06^2) / (0.65 x 10^-2)

C1 = 1.54 x 10^-11 F

now d = 1.4 cm

so C2 = 7.15 x 10^-12 F

and V = 15 V

Q1 = C1 V = 231 x 10^-12 C  

Q2 = C2 V = 107.25 x 10^-12 C

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