Radioactivity is affected by:

Classify the following statements into true or false. i. Radioactivity is unaffected by pressure and temperature. ii. Radioactivity is affected by large electric and magnetic fields. iii. The rate of disintegration of a radioactive substance at a particular time is directly proportional to the number of atoms present initially. iv. Nuclear force is charge independent but it depends on the relative orientation of the spins.

At t=0 , number of radioactive nuclei of a radioactive substance are x and its radioactivity is y. Half-life of radioactive substance is T. Then,

At t=0 , number of radioactive nuclei of a radioactive substance are x and its radioactivity is y. Half-life of radioactive substance is T. Then,

Assertion: Artificial radioactivity is an controlled process. Reason: It is a spontaneous process - natural radioactivity,

Natural radioactivity : uncontrolled :: Artificial radioactivity :____________

What is Artificial Radioactivity (or) Induced Radioactivity ?

Natural radioactivity and artificial radioactivity were discovered respectively