Home
Class 12
PHYSICS
Number jof nuclei of radioactive substan...

Number jof nuclei of radioactive substance at time t=0 are 1000 and 9000 at time t=2 s. Then number of nuclie at time t=4 s will be

A

800

B

810

C

790

D

700

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

Number of nuclei of a radioactive substance are 1000 and 900 at times t=0 and time t=2 s . Then, number of nuclei at time t=4s will be

At time t=0 , number of nuclei of a radioactive substance are 100. At t=1 s these numbers become 90. Find the number of nuclei at t=2 s .

At time t=0 , number of nuclei of a radioactive substance are 100. At t=1 s these numbers become 90 . Find the number of nuclei at t=2 s .

Half-life of a radioactive substance is T. At time t_1 activity of a radioactive substance is R_1 and at time t_2 it is R_2 . Find the number of nuclei decayed in this interval of time.

Nuclei of radioactive element A are produced at rate t^(2) (where t is time) at any time t . The element A has decay constant lambda . Let N be the number of nuclei of element A at any time t . At time t=t_(0), dN//dt is minimum. The number of nuclei of element A at time t=t_(0) is

The activity of a radioactive susbtance is R_(1) at time t_(1) and R_(2) at time t_(2) (>t1). its decay constant is λ. Then, number of atoms decayed between time interval t_(1) and t_(2) are

Two radioactive substances have half-lives T and 2T. Initially, they have equal number of nuclei. After time t=4T , the ratio of their number of nuclei is x and the ratio of their activity is y. Then,

At t=0 , number of radioactive nuclei of a radioactive substance are x and its radioactivity is y. Half-life of radioactive substance is T. Then,

The half-life of a sample of a radioactive substance is 1 hour. If 8 xx 10^10 atoms are present at t = 0 , then the number of atoms decayed in the duration t = 2 hour to t = 4 hour will be