An alpha particle having 12.5 MeV kinetic energy collides with copper nucleus (Z=29) and retraces it s path .What is the size of the nucleus?
Given,`1/(4 pi e_0) = 9 xx 10^9 N m^2 C^(-2)`.

An alpha -particle of 10MeV collides head on with a copper nucleus (Z=29) and returns on its original path. What conclusion would your draw about between the centres of the particle and nucleus

An alpha particle having kinetic energy equal to 8.7 MeV is projected towards the nucleus of copper with Z=29.Calculate its distance of closet approach.

An alpha -particle having kinetic energy 5 MeV falls on a Cu-foil. The shortest distance from the nucleus of Cu to which alpha - particle reaches is (Atomic no. of Cu=29, K=9xx10^(9)Nm^(2)//C^(2) )

Assuming the earth to be a sphericl conductor of radius 6400 km, calculate its caacitance. Given 1/(4piepsilon_0) = 9 xx 10^9 Nm^2^-2

Shown in the figure four point charges at the corners of a square of side 2 cm. Find the magnitude and direction of the electric field at the centre O of the square, if Q = 0.02 muC Use 1/(4piepsilon_0) = 9 xx 10^9 N m^2 C^-2

Three charges of +0.1 C each are placed at the vertices of an equilateral triangle of each side 1m. If the energy is supplied at the rate of 1.0 kw, how many hours would be required to move one of the charges on to the mid point of the line joining the other two? Given =1/(4piepsilon_0) = 9xx 10^9 N ^2C^-2

The electric potential at 0.1m from a point charge is 90V. What is the magnitude of the charge? Given, epsilon_0=8.854xx10^-12 C^2 N^-1 m^-2

The electric potential at 0.3m from a point charge is 30V. What is the magnitude of the charge? Given epsilon_0=8.854xx10^-12 C^2 N^-1 m^-2