Solve
Study
Textbooks
Guides
Use app
Login
>>
Class 12
>>
Physics
>>
Nuclei
>>
First Order Radioactive Decay
>>
Two radioactive materials A and B have d
Question
Two radioactive materials
A
and
B
have decay constants
1
0
λ
and
λ
, respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of
A
to that of
B
will be
1
/
e
after a time:
A
1
0
λ
1
1
B
9
λ
1
C
1
0
λ
1
D
1
1
λ
1
1
Medium
JEE Mains
Open in App
Updated on : 2022-09-05
Solution
Verified by Toppr
Correct option is B)
N
1
=
N
0
e
−
1
0
λ
t
N
2
=
N
0
e
−
λ
t
e
1
=
N
2
N
1
=
e
−
9
λ
t
⇒
9
λ
t
=
1
t
=
9
λ
1
Was this answer helpful?
0
0
Similar questions
Two radioactive substances A and B have decay constants
5
λ
and
λ
respectively. At
t
=
0
, they have the same number of nuclei. The ratio of number of nuclei of A to that of B will be
(
1
/
e
)
2
after a time interval of
Hard
View solution
>
Two radioactive materials
X
1
and
X
2
have decay constants
1
0
λ
and
λ
, respectively. If initially they have the same number of nuclei, the ratio of the number of nuclei of
X
1
to that of
X
2
be
1
/
e
after a time
Medium
View solution
>
Two radioactive materials A and B have decay constants
5
λ
a
n
d
λ
respectively. Initially both A and B have the same number of nuclei. The ratio of the number of nuclei of A to that of B will be
e
1
after a time
Hard
View solution
>
Two radioactive materials
X
1
and
X
2
have decay constants
1
0
λ
and
λ
respectively. If initially, they have the same number of nuclei, then the ratio of the number of nuclei of
X
1
to that of
X
2
will be
1
/
e
after a time.
Medium
View solution
>
Two radioactive substances
A
and
B
have decay constants
5
λ
and
λ
respectively. At
t
=
0
, they have the same number of nuclei. The ratio of number of nuclei of
A
to those of
B
will be
(
1
/
e
2
)
after a time:
Hard
AIIMS
View solution
>
More From Chapter
Nuclei
View chapter
>
Revise with Concepts
Law of Radioactive Decay
Example
Definitions
Formulaes
>
Plot Number of Neutrons vs Protons for Radioactive Decay
Example
Definitions
Formulaes
>
Half Life
Example
Definitions
Formulaes
>
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
NEET Questions
1 Qs
>
Easy Questions
116 Qs
>
Medium Questions
625 Qs
>
Hard Questions
258 Qs
>