What is the total charge of a system containing five charges `+1,+2,-3,+4` and `-5` in some arbitrary unit ?

What is the total charge on 75.0 kg of electrons ?

What is the potential energy of the charge and dipole system shown in (Fig. 3.93) ? .

The centre of mass is defined as vecR=1/Msum_im_ivecr_i . Suppose we define centre of charge as vecR_c=1/Qsum_iq_Ivecr_i where q_i represents the ith charge placed at vecr_i and Q is the total charge of the sytem a. Can a centre of charge of two charge system be outside the line segment joining the charges? b. If all the charges of a system are in X-Y plane? c. If all the charges of a system lie in a cube, is it necessary that the centre of charge be in the cube?

The total flux linked with unit negative charge put in air is

Charges -q , Q, and -q are placed at an equal distance on a straight liner. If the total potential energy of the system of three charges is zero, then find the ratio Q//q . .

Find out potential energy of the two point charge system having charges q_(1) and q_(2) separated by distance r.

A point charge q_1 = 4.00 nC is placed at the origin, and a second point charge q_2 = -3.00 nC , placed on the x-axis at x = + 20.0 cm. A third point charge q_3 = 2.00 nC is placed on the X-axis between q_1, and q_2 . (Take as zero the potential energy of the three charges when they are infinitely far apart). (a) What is the potential energy of the system of the three charges if q_3 is placed at x= + 10.0 cm? (b) Where should q_3 be placed to make the potential energy of the system equal to zero?

Total charge in faraday present in 54 gm of Al^(3+) ion.

Total electric flux associated with unit positive charge in vacuum is

Consider a closed surface of arbitatry shape as shown in figure. Suppose a single charge Q_1 is located at some point within the surface and second charge Q_2 is located outside the surface. a. What is the total flux passing through the surface due to charge Q_1 ? b. What is the total flux passing through the surface due to charge Q_2 ?