A paralle plate capacitor is made up of stair like structure with a palte area A of each stair and that is connected with a wire of length b, as shown in the figure. The capacitance of the arrangement is 15xbε0A. The value of x is ______.
Answer: 23
Solution
The stair-like structure forms three capacitors in parallel. Each capacitor has plate area A and different separations: 5b, 3b, and b.