Consider a coin, It is electrically neutral and contains equal amounts of positive and negative charge of magnitude `34.8 kC`. Suppose that these equal charages were concentrated two point charges separated by
100 m(-length of a long building),find the force on each such point charge in this case. What do you conclude from these results?

Consider a coin. It is electrically neutral and contains equal amounts of positive and negative charge of magnitude 34.8 kC . Suppose that these equal charages were concentrated two point charges separated by 10^6 , (radius of the earth). find the force on each such point charge. What do you conclude from these results?

A paisa coin is made up of Al-Mg alloy and weights 0.75g. It has a square shape and its diagonal measures 17 mm. it is electrically neutral and contains equal amounts of positive and negative charges. Treating the paisa coins made up of only Al, find the magnitude of equal number of positively and negatively charages. what conclusion do you draw from this magnitude?

Two point charges equal to +10muC and +20muC are 1 m apart. What is the amount of work done to bring them clsoer to each other by 50 cm.

Consider an over all neutral sphere of radius R. This sphere has a point charge +Q at its centre and this positive charge is surrounded by a uniform density rho of negative charge upto a radius R. Use Gauss' law to obtain expressions for the electric field of this at a point distant r form tis centre. where r > R. show that these two expressions give identical results for the elctric field at r = R

Consider an over all neutral sphere of radius R. This sphere has a point charge +Q at its centre and this positive charge is surrounded by a uniform density rho of negative charge upto a radius R. Use Gauss' law to obtain expressions for the electric field of this at a point distant r form its centre. where r < R. show that these two expressions give identical results for the elctric field at r = R.

Two pith-balls each of mass 5xx10^-4 kg are suspended from the same point by silk threads 0.2 m long equal charges are given to the balls, which separate, until the threads enclose an angle of 30^@ , Calculate the charge on each pith-ball.

Two fixed, equal, positive charges, each of magnitude 5xx10^-5 coul are located at points A and B separated by a distance of 6m. An equal and opposite charge moves towards them along the line COD, the perpendicular bisector of the line AB. The moving charge, when it reaches the point C at a distance of 4m from O, has a kinetic energy of 4 joules. Calculate the distance of the farthest point D which the negative charge will reach before returning towards C.

Two pith-balls each weighing 10^-3 kg are suspended from the same point by mans of silk threads 0.5 m long. On charging the pith-balls equally, they are found to repel each other to a distance of 0.2 m. Calculate the charge on each ball?

Two equally charged identical metal spheres A and b repel each other with a fore 2.0 xx 10^-5 N . Another identical uncharged sphere C is touched to A and the nplaced at the md point between A and B. What is the net electric force on C?

An electric dipole consists of two opposite charges each of magnitude 6xx 10^-8 coulomb separated by 6.0 cm. The dipole is placed in an external electric field of 5xx10^-5NC^-1 How much work will an external agent have to do in turning the dipole through 180^@ , starting from the position theta = 0^@ ?