Capacitor 3 in Figure is a variable capacitor (its capacitance C3 can be varied). Figure gives the

Question:

Capacitor 3 in Figure is a variable capacitor (its capacitance C3 can be varied). Figure gives the electric potential V1 across capacitor 1 versus C3. The horizontal scale is set by C3s = 12.0μF. Electric potential V1 approaches an asymptote of 10 V as C3 ????. What are?

(a) The electric potential V across the battery,

(b) C1, and