592 CHAPTER 16 Electrical Energy and Capacitance 8. A parallel-plate capacitor with no dielectric is made from two plates separated by 1.15 X 10-3 m. (a) Deter- mine the device's capacitance if each plate has an area of 0.250 m?. (See Section 16.6.) (b) What magnitude of charge is stored on each plate when the capacitor is connected to a 12.0-V battery? (See Section 16.6.) (c) If a material of dielectric constant 12.5 is inserted between the plates, what are the new values of the capacitance and (d) the magnitude of charge stored on each plate? (See Section 16.10.) 9. Two capacitors have capacitance 2.00 uF and 3.00 /F, respectively. Calculate the equivalent capacitance in microfarads if the capacitors are put (a) in parallel with each other, and (b) in series with each other. (See Section 16.8.)