The figure below shows a circuit section of four air-filled capacitors that is c

Question

The figure below shows a circuit section of four air-filled capacitors that is connected to a larger circuit. The graph below the circuit shows the electric potential V(x) as a function of position x along the lower part of the section, through capacitor 4. Similarly, the graph above the section shows the electric potential V(x) as a function of position x along the upper part of the section, through capacitors 1, 2, and 3. Capacitor 3 has a capacitance of 0.82 ?F. a) what is the capacitance of capacitor 1? b) what is the capacitance of capacitor 2

Explanation / Answer

V across C3= 12-2-5 = 5V Q in C3=VC3 = 0.82*5uC = 4.1uC Q in C1= Q in C2 = Q in C3 (series) C1= 2/4.1 = 0.488uC C2 = 5/4.1 = 1.22uC

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