Four metallic plates each with a surface area of one side A, are placed at a distance d from each other. The two outer plates are connected to one point A and the two other inner plates to another point B as shown in the figure. Then the capacitance of the system is :

n equal capacitors are first connected in series and then in parallel. The ratio of capacitances in series and parallel arrangements will be :

The minimum number of capacitors each of 3 μF required to make a circuit with an equivalent capacitance 2.25 μF is :

When three capacitors of equal capacities are connected in parallel and one of the same capacity is connected in series with its combination. The resultant capacity is 3.75μF. The capacity of each capacitor is

A spherical drop of capacitance 1 μF is broken into 8 drops of equal radius. Then, the capacitance of each small drop is:

Three capacitors of capacitance 1.0,2.0 and 5.0μF are connected in series to a 10V source. The potential difference across the 2.0μF capacitor is

A person has only two capacitors. By using them singly, in parallel or in series, he is able to obtain the capacitance 2μF,3μF,6μF and 9μF. What are the capacitance of the capacitors?

Two condensers each of capacitance 2μF are connected in parallel and this combination is connected in series with a 12μF capacitor. The resultant capacity of the system will be:

A charge Q is divided into two parts. The two charges kept at a distance apart have a maximum columbian repulsion. Then the ratio of Q and one of the parts is given by :

Two equally charged identical metal spheres A and B repel each other with a force F. Another identical uncharged sphere C is touched to A and then placed midway between A and B. The net force on C is in the direction: