90% of a radioactive sample is left unde...

`90%` of a radioactive sample is left undecayed after time `t` has elapesed. What percentage of the initial sample will decay in a total time `2 t` ?

A

0.2

B

0.19

C

0.4

D

0.38

Text Solution

Verified by Experts

The correct Answer is:

B

`100 overset(t)to90%overset(t)to81%`

Topper's Solved these Questions

NUCLEI
DC PANDEY|Exercise B Medical entrance special format questions|9 Videos
NUCLEI
DC PANDEY|Exercise MATCH THE COLUMNS|4 Videos
NUCLEI
DC PANDEY|Exercise CHECK POINT 13.3|15 Videos
MODERN PHYSICS - 2
DC PANDEY|Exercise Level 2 Subjective|10 Videos
RAY OPTICS
DC PANDEY|Exercise Medical entrance gallary|76 Videos

Similar Questions

Explore conceptually related problems

True or False Statements : 90% of a radioactive sample is left undecayed after time t has elapsed, percentage of the initial sample which will decay in a total time 2t is 19%.

Ninety precent of a radoactive sample is left over after a time interval t. The percentage of initial sample that will disntegrate in an interval 2t is-

It is observed that only 6.25% of a given radioactive sample is left undecayed after a period of 16 days. What is the decay constant of this sample in day^-1 ?

A radioactive sample is decayed 20% in one day. After next two days, the undecayed percentage of nuclei will be

What percentage of the atoms in a sample will remain undecayed in a time equal to mean life ?

A radioactive sample remains undecayed 9/16 after time t.How much sample remains undecayed after time t/2

In a sample of radioactive material, what percentage of the initial number of active nuclei will decay during one mean life ?

36% amount of a radioactive sample distegrates in t time. Calculate how much percentage fraction will decay in t//2 time.

The decay constant for a given radioactive sample is 0.3465 day^-1 . What percentage of this sample will get decayed in a period of 4 days?

DC PANDEY-NUCLEI-CHAPTER EXERCISES

The total number of alphaandbeta particles emitted in the nuclear reac...
Text Solution
|
Suppose we consider a large number of continers each containing initia...
Text Solution
|
90% of a radioactive sample is left undecayed after time t has elapese...
Text Solution
|
M(x) and M(y) denote the atomic masses of the parent and the daughter ...
Text Solution
|
Half life of a radio-active substance is 20 minutes. The time between ...
Text Solution
|
A freshly prepared radioactive source of half-life 2 h emits radiation...
Text Solution
|
The decay constant of a radioactive sample is 'lambda'. The half-life ...
Text Solution
|
A radioactive substance disintegrates 1/64 of initial value in 60 s. T...
Text Solution
|
In the reaction .1^2 H + .1^3 H rarr .2^4 He + .0^1 n, if the binding ...
Text Solution
|
A radioactive sample has N0 active at t = 0 . If the rate of disintegr...
Text Solution
|
The plot of the number (N) of decayed atoms versus activity (R) of a r...
Text Solution
|
The graph between the instantaneous concentration (N) of a radioactive...
Text Solution
|
Two redioactive materials X(1)andX(2) have decay constants 10lamdaandl...
Text Solution
|
Two redioactive nuclei A and B have disintegration constants lamda(A)a...
Text Solution
|
What is the binding energy per nucleon of (6)C^(12)nucleus? Given , ...
Text Solution
|
A radioactive isotope X with a half-life of 1.37 xx 109 years decays t...
Text Solution
|
The energy released by the fission of a single uranium nucleus is 200 ...
Text Solution
|
A common example of beta-"decay" is ""(15)P^(32)to""(16)P^(32)+x+y ...
Text Solution
|
A nucleus with Z =92 emits the following in a sequence: alpha,beta^(...
Text Solution
|
Binding energy per nucleons vs mass curve for nucleus is shown in the ...
Text Solution
|