AP EAMCET Engineering 2013 Solved Paper

Two metal plates each of area 'A' form a parallel plate capacitor with air in between the plates. The distance between the plates is ' d '. A metal plate of thickness

d

2

and ofsame area A is inserted between the plates to form two capacitors of capacitances C1 and C2 as shown in the figure. If the effective capacitance of the two capacitors is C′ and the capacitance of the capacitor initially is C, then

C′

C

is