1. Two parallel-plate capacitors are circular and have the same gap sizes. The radius of the first is R and the radius of the second is 2R. If the capacitance of the first capacitor is C, then the capacitance of the second one is:

C	C/4	4C	2C
C/2

2. Two capacitors and a voltage source are connected in series, as shown. Let C1=1.55pF, let C2=7.25pF, and let V0=770V.