Solve
Study
Textbooks
Guides
Use app
Login
>>
Class 12
>>
Physics
>>
Nuclei
>>
First Order Radioactive Decay
>>
Half life and mean life of radioactive s...
Half life and mean life of radioactive substances
9 Mins
Physics
Language
Rate
NEXT VIDEOS
Disintegration Energy and Conservation of Energy in Nuclear Reactions
9 mins
Successive Disintegration
13 mins
Problem Based on Successive Disintegration
7 mins
Radioactivity - Emission of Alpha,Beta and Gamma Radiations
9 mins
Atomic energy research and development in India
3 mins
REVISE WITH CONCEPTS
Half-Life Calculation - Basic
Example
Definitions
Formulaes
>
Law of Radioactive Decay
Example
Definitions
Formulaes
>
Half Life
Example
Definitions
Formulaes
>
Half Life And Mean Life
Example
Definitions
Formulaes
>
View more
QUICK SUMMARY WITH STORIES
Successive Disintegration
2 mins
Radioactive Decay and its types
3 mins
Half Life and Mean Life of Radioactive Substances
2 mins
Average Life Period and Half Life in Nuclear Reactions
2 mins
Half Life - Problems L1
2 mins
View more
Important Questions
State the law of radioactive decay. Hence derive the expression
$N=N_{0}e_{−λt}$
where symbols have their usual meanings.
Medium
View solution
>
For a radioactive material, half-life is
$10$
minutes. If initially there are
$600$
number of nuclei, the time taken (in minutes) for the disintegration of
$450$
nuclei is?
Medium
NEET
View solution
>
A radioactive nucleus of mass
$M$
emits a photon of frequency
$v$
and the nucleus recoils. The recoil energy will be
Medium
View solution
>
In a first order reaction the concentration of reactant decreases from
$800mol/dm_{3}$
to
$50mol/dm_{3}$
in
$2×10_{2}s$
. The rate constant of reaction in
$s_{−1}$
is:
Medium
View solution
>
A radioactive sample at any instant has its disintegration rate
$5000$
disintegration per minute. After
$5$
minutes, the rate is
$1250$
disintegrations per minute. Then, the decay constant, per minute, is
Medium
View solution
>
Two radioactive sources A and B initially contain equal number of radioactive atoms. Source A has a half-life of 1 hour and source B has a half-life of 2 hours. At the end of 2 hours, the ratio of the rate of disintegration of A to that of B is :
Easy
View solution
>
The relation between half life (
$T$
) and decay constant (
$λ$
) is
Medium
View solution
>
The activity of a radioactive sample is measured as 9750 count/min at t = 0 and 975 count/min at t = 5 min.The decay constant is nearly
Medium
View solution
>
Define the term: Half-life period and decay constant of a radioactive sample.
Derive the relation between these terms.
Medium
View solution
>
Activity of a radioactive element is
$10_{3}$
dps. Its half life is
$1sec$
. After
$3sec$
its activity will be (
$dps=decaypersecond$
)
Medium
View solution
>