Use app

>>Class 12
>>Physics
>>Nuclei
>>First Order Radioactive Decay
>> $A radioactive sample with a half life of$

Question

A radioactive sample with a half life of 1 month has the label :'Activity=2 micro curies on 1-8-1991.What would be its activity two months earlier?

1.0 micro curie

0.5 micro curie

4 micro curie

8 micro curie

Medium

Open in App

Updated on : 2022-09-05

Solution

Verified by Toppr

Correct option is D)

Was this answer helpful?

A radioactive sample with a half-life of 1 month has the label: activity =2 microcuries on 1-8-1991. What would be its activity two months earlier?

Hard

View solution

The activity of a radioactive sample is measured as N $_{0}$ counts per minute at t = 0 and N $_{0}$ /e counts per minute at t = 5 minutes. The time (in minutes) at which the activity reduces to half its value is

Easy

View solution

Two radioactive nuclei $P$ and $Q,$ in a given sample decay into a stable nucleus $R .$ At time $t = 0,$ number of $P$ species are $4 N_{0}$ and that of $Q$ are $N_{0} .$ Half-life of $P$ (for conversion to $R$ ) is $1 m i n u t e$ where as that of $Q$ is $2 m i n u t e s .$ Initially there are no nuclei of $R$ present in the sample. When number of nuclei of $P$ and $Q$ are equal, the number of nuclei of $R$ present in the sample would be :

Medium

View solution

Two radioactive elements A & B have initial activity 10 curies & 20 curies respectively. If A has twice no of moles that of B then, The decay constant $λ_{A} & λ_{B}$ can be

Hard

View solution

The mass of $U^{234}$ , with half-life $2.5 \times 1 0^{5}$ , corresponding to its activity of $1$ Curie will be

Medium

View solution

Revise with Concepts

Law of Radioactive Decay

ExampleDefinitionsFormulaes

Plot Number of Neutrons vs Protons for Radioactive Decay

ExampleDefinitionsFormulaes

Half Life

ExampleDefinitionsFormulaes

Learn with Videos

Law of radioactive decay

8 mins

Radioactive Decay using Differential Equations

9 mins

Half life and mean life of radioactive substances

9 mins

Problems based on radioactive decay

18 mins

Alpha, Beta, and Gamma Decay

14 mins

Practice more questions

A radioactive sample with a half life of 1 month has the label :'Activity=2 micro curies on 1-8-1991.What would be its activity two months earlier?

1.0 micro curie

0.5 micro curie

4 micro curie

8 micro curie

A radioactive sample with a half-life of 1 month has the label: activity =2 microcuries on 1-8-1991. What would be its activity two months earlier?

The activity of a radioactive sample is measured as N0​ counts per minute at t = 0 and N0​/e counts per minute at t = 5 minutes. The time (in minutes) at which the activity reduces to half its value is

Two radioactive elements A & B have initial activity 10 curies & 20 curies respectively. If A has twice no of moles that of B then, The decay constant λA​&λB​ can be

The mass of U234, with half-life 2.5×105, corresponding to its activity of 1 Curie will be

Revise with Concepts

Law of Radioactive Decay

Plot Number of Neutrons vs Protons for Radioactive Decay

Half Life

The activity of a radioactive sample is measured as N $_{0}$ counts per minute at t = 0 and N $_{0}$ /e counts per minute at t = 5 minutes. The time (in minutes) at which the activity reduces to half its value is

Two radioactive elements A & B have initial activity 10 curies & 20 curies respectively. If A has twice no of moles that of B then, The decay constant $λ_{A} & λ_{B}$ can be

The mass of $U^{234}$ , with half-life $2.5 \times 1 0^{5}$ , corresponding to its activity of $1$ Curie will be