Is there any lower limit to the electric force between two
particles placed at a separation of 1 cm?

Suppose ana attractive nuclear force acts between two protons which may be written as F = Ce^(-kr) //r^2, (a) Write down the dimensional formulae and appporpriate SI units of C and k. (b) Suppose that k = 1 fermi^(-1) and that the repulsive electreic force between the protons is just blanced by the attractive nuclear force when the separation is 5 fermi. Find the value of c.

Find the ratio of the electric and gravitational forces between two protons.

Two small iron particles, each of mass 280 mg, are. placed at a distance 10 cm apart. If 0.01% of the electron. of one particle are transferred to the other, find the. electric force between them. Atomic weifht of iron is 56 g mol^(-) and there are 26 electrons in each atom of iron.

Find the electric force between two protons separted by a distance of 1 fermi (1fermi = 10^(15)m). The protons in a nucleus remain at a separaton of this order.

Two charged particle A and B repel each other by a force k/r^2 where is a constant and r is th separation between them. The particle A is clamped to a fixed point in the lab and the particle B which has a mass m, is released from rest with asn initial separartion r_0 form A. Find the change in the potential energyof hte wo particle system as the separation increases to a large value. What will be the speed o the particle b in this situation?

Calculate the ratio of electric to gravitational force between two electrons.

Two long, straight wires, each carrying an electric current of 5.0 A, are kept parallel to each other at a separation of 2.5 cm. Find the magnitude of the magnetic force experienced by 10 cm of a wire.

Find the ratio of the magnitude of the electric force to the grativational force acting between two protons.

Let E,G and N represent the magnitudes of electromagnetic, gravitational and nuclear forces between two electrons at a given separation. Then

The law that governs the force between electric charges is :