Five identical plates of equal area A are placed parallel to each other and at equal distance d from each other as shown in the figure. The effective capacity of the system between the terminals A and B is

Four plates of equal area A are separated by equal distance d and are arranged as shown in the figure. The equivalent capacity is

Four metallic plates each with a surface area A of one side and placed at a distance d from each other. the plates are connected as shown in the fig. Then the capacitance of the system between a and b is -

Four metallic plates each with a surface area A of one side and placed at a distance d from each other. the plates are connected as shown in the fig. Then the capacitance of the system between a and b is -

Four identical metal plates each of area A are separated mutually by a distance d and are connected as shown. Find the capacity of the system between the terminals A and B.

Four metallic plates each with a surface area of one side A are placed at a distance d from each other as shown. Then, the capacitance of the system between X and Y is

Four metallic plates each with a surface area of one side A are placed at a distance d from each other. The plates are connected as shown in the circuit diagram. Then the capacitance of the system between a and b is

Seven indetical plates each of area A and successive separation d are arranged as shown in figures, the effective capacitance of the system between