JEE-ADVANCED SERIES Physics
Deccay Rate
4 previous year questions.
Volume: 4 Ques
Yield: Medium
High-Yield Trend
1
2006 1
2004 1
2000 1
1987 Chapter Questions 4 MCQs
01
PYQ 1987
medium
physics ID: jee-adva
During a negative beta decay
1
an atomic electron is ejected
2
an electron which is already present within the nucleus is ejected
3
a neutron in the nucleus decays emitting an electron
4
a part of the binding energy of the nucleus is converted into an electron
02
PYQ 2000
medium
physics ID: jee-adva
Two radioactive materials and have decay constants and respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of to that of will be 1/e after a time
1
2
3
4
03
PYQ 2004
medium
physics ID: jee-adva
After 280 days, the activity of a radioactive sample is 6000 dps. The activity reduces to 3000 dps after another 140 days. The initial activity of the sample in dps is
1
6000
2
9000
3
3000
4
24000
04
PYQ 2006
medium
physics ID: jee-adva
Half-life of a radioactive substance A is 4 days. The probability that a nucleus will decay in two half-lives is
1
2
3
4
1