A proton and `alpha`-particle are placed at separation `d` on a smooth surface . The ratio of their speed when separation becomes infinite will be

(a) Two protons are placed at separation d on a smooth surface. Find the speed of each proton when separation between them is doubled. (b) An alpha -particle and a proton are placed at a separation d on a smooth surface.Find the speed of each when separation between them becomes infinite. ( m : mass of proton , e : charge of proton.)

A proton and an alpha-particle are accelerated through the same potential difference. The ratio of the de Broglie wavelength of the proton to the de Broglie wavelength of the alpha-particle will be

A proton and and alpha - particle are accelerated through a potential difference of 100 V . The ratio of the wavelength with the proton to that associated to that associated with an alpha - particle is

If alpha -particle and a proton has same K.E. then the ratio of their wavelength is

Two particles of masses 2m and 3m are placed at separation d on a smooth surface. They move towards each other due to mutual attractive force. Find (a) acceleration of c.m. (b) Velocity of c.m. when separation between particles becomes d//3 . ( c) At what distance from the initial position of mass 2m , the particles collide.

Two particles of masses 2m and 3m are placed at separation d on a smooth surface. They move towards each other due to mutual attractive force. Find (a) acceleration of c.m. (b) Velocity of c.m. when separation between particles becomes d//3 . ( c) At what distance from the initial position of mass 2m , the particles collide.

A proton and an alpha particle are accelerated through the same potential difference. The ratio of the wavelengths associated with the proton to that associated with the alpha particle is

A proton and an alpha -particle are accelerated through the same potential difference. The ratio of de-Broglie wavelength of proton to the de-Broglie wavelength of alpha particle will be