Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t=0 it was 1600 counts per second and t=8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t=6 seconds is close to :
(a)
150
(b)
360
(c)
200
(d)
400
Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t=0 it was 1600 counts per second and t=8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t=6 seconds is close to :
(a)
150
(b)
360
(c)
200
(d)
400
Question ID - 50227 | SaraNextGen Top Answer
Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t=0 it was 1600 counts per second and t=8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t=6 seconds is close to :
(a)
150
(b)
360
(c)
200
(d)
400
|
Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t=0 it was 1600 counts per second and t=8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t=6 seconds is close to : |
|||
|
(a) |
150 |
(b) |
360 |
|
(c) |
200 |
(d) |
400 |
1 Answer
127 votes
Answer Key / Explanation : (c) -
at t=0,
=
=1600C/s
at t=8s, A=100C/s
=
in 8 sec
Therefore half-life is 
=2 sec
Activity at t = 6 will be 1600
= 200C/s
correct answer is (c).
127 votes
Answer Link
127