Physics Past Questions and Answers

The process of increasing the energy of an atom via inelastic collision with an electron is known as

A radioactive nuclide of proton number X emits a \(\beta\)-particle to form a new nuclide to proton number Y. The correct equation relating X and Y is

The frictional effect between the layers of a moving fluid is called

Two radioactive elements X and Y have half-lives of 100 and 50 years respectively. Samples of X and Y initially contain equal number of atoms. What is the ratio of the number of the remaining atoms of X to that of Y after 200 years?

It is always not possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the