Consider the situation shown in (figure) what are the signs of `q_1` and `q_2` ? If the lines are drawn in proportion to the charge, what is the ratio `q_1/q_2` ?

As C=(1/V)Q , can you say that the capacitor C is proportion to the charge Q ?

Consider the situation shown in figure. The wires P1Q1 and P2Q2 are made to slide on the rails with the same speed 5cm/sec . Find the electric current in the 19Ω resistor if (a) both the wires move towards right and (b) if P 1Q1 moves towards left but P2Q2 moves towards right.

Consider the processes A and B shown in Figure (27- Q3 ) It is possible that (fig.)

The electric potential enegy U of the system of charges q_1 and q_2 is

The following pictures depict electric field lines for various charge configurations. (i) In figure (a) identify the signs of two charges and find the ratio |(q_(1))/(q_(2))| (ii) In figure (b) calculate the ratio of two positive charges and identify teh strength of the electric field at three points A, B and C (iii) Figure (c) represents the electric field lines for three charges . If q_(2) =-20nC then calculate the values of q_(1) and q_(3)