If charges of two particles are increased two times but the distance between them remains same than state what difference will occur in the attraciton of two particles.

What is the phase difference between any two points on the same wavefront?

Show that the distance between two points remains unaltered by the translation of axes .

State two differences between cathode & anode rays.

What is the difference between a beta -particle and an electron?

Two insulated metal spheres of the same size are charged with -15 esu and +25 esu. The distance between their centres is 10 cm. What is the force acting between the two charges? If the two spheres are made to touch each other and then placed in their previous positions, what will be the force acting between them?

What is the difference between a beta -particle and' an electron?

Coulomb’s law for electrostatic force between two point charges and Newton’s Jaw of gravitational force between dependence on the distance between the charges/ masses. Compare the strength of these forces by determining the ratio of their magnitudes : for two protons.

The sum of two numbers is equal to 80. Three times of the difference of them is 20 more than the greatest number. Find the two numbers.