Question

1. Three capacitors are connected in series and give an effective capacitance of 22 nF. If C1 = 5 µF and C3 = 100 nF, what is C2? Suppose V1 = 5 V. Find the charge on and voltage across the other two capacitors. Again, calculate energy stored.

2. A parallel plate capacitor has plates with area 10 cm2 and a gap of 2 mm. First, find the capacitance of this capacitor. Now, imagine a metal plate of thickness 0.25 mm and the same size and shape as the other two plates is slid into the gap. This creates two new parallel plate capacitors. Label them C1 and C2. If the gap for C1 is 1 mm, find the values of C1, C2, and Cseries. What happens to C1, C2, and Cseries as the gap for C2 is made smaller?

Answer 1