A capacitor is made of a flat plate of area A and a second plate having a stair like structure as shown in figure. The width of each stair is a& the height isb . FIND THE CAPACITANCE OF THE ASSEMBLY.

the given arrangement of the flat plate and staircaselike structure is equivalent to the parallel combinatio of 3 cap.c1 c2 c3. the plate area of each of the 3 cap. is a/3 ,while the seperation between the plate of 3 cap. is d 2d 3d soooooooo answer will be 

C =11 upsilon A/18d

Approved