Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Physics Nuclear Physics Radioactivity
The mean life of a radioactive substance is
1
Equal to disintegration constant
2
Reciprocal of disintegration constant
3
Directly proportional to disintegration constant
4
More than one of the above
5
None of the above