Two identical metal plates are given positive charges Q₁ and Q₂ (< Q₁ ) respectively. If they are now brought close together to form a parallel plate capacitor with capacitance C, the potential difference between them is

The reactant (X) in the reaction, (X) Cinnamic acid 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

The correct set of the products obtained in the following reactions is

a) 

b) 

c) 

d) 

A sphere of radius r is charged to a potential V. The outward pull per unit area of its surface is given by

Aniline is not the major product in one of the following reactions. Identify that reaction.

The reaction, is called:

If area of each plate is A and the successive separations are d, 2d and 3d then the equivalent capacitance across A and B is

Two plates, each of area A, are placed parallel to each other at a distance d. One plate is connected to a battery of e.m.f. E and its negative is earthed. The other plate is also earthed.

The charge drawn by plate is

Two identical capacitors have the same capacitance C. One of them is charged to potential  and the other to . The negative ends of the capacitors are connected together. When the positive ends are also connected, the decrease in energy of the system is

A capacitor of capacitance  charged to a potential  and then isolated. A small capacitor C is then charged from  , discharged and charged again; the process being repeated n times. Due to this, potential of the larger capacitor us decreased to V . The value of C is