If 10% of a radioactive substance decays...

If `10%` of a radioactive substance decays in every 5 year, then the percentage of the substance that will have decaed in `20 years` will be .

A

`40%`

B

`50%`

C

`65.6%`

D

`34.4%`

Text Solution

Verified by Experts

The correct Answer is:

D

Topper's Solved these Questions

NTA NEET SET 65
NTA MOCK TESTS|Exercise PHYSICS|44 Videos
NTA NEET SET 67
NTA MOCK TESTS|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

99% quantity of a radioactive substance decays between

50% of a radio active substance decays in 5 hours. The time required for the 87.5% decays is

If 20% of a radioactive sample decays in 10 days, then the amount of substance left after 20 days will be approximately

The decay constant of a radioactive substance is 1 per month. The percentage of radioactive substance left undecayed after two months will be

A radioactive substance has decay constant of 0.231 "day"^(-1) . Calculate the percentage of the substance left after 6 days.

20% of a radioactive substances decay in 10 days . Calculate the amount of the original material left after 30 days.

A radioactive substance has a half-life of 1 year. The fraction of this material, that would remain after 5 years will be.

Half life of radioactive substance is 3.20 h. What is the time taken for 75% substance to be used?

The half life period of a radioactive substance is 10 year. The amount of the substance decayed after 40 years would be

NTA MOCK TESTS-NTA NEET SET 66-PHYSICS

The acceleration of 3 kg block in the arrangement shown in the diagra...
Text Solution
|
Consider a car moving on a straight road with a speed of 100m//s. The ...
Text Solution
|
If 10% of a radioactive substance decays in every 5 year, then the per...
Text Solution
|
The half-life period of a radio-active element X is same as the mean l...
Text Solution
|
A particle of mass 1 kg is moving in SHM with path length 0.01 m and a...
Text Solution
|
A partical of mass m is moving along the x-axis under the potential V ...
Text Solution
|
When ultraviolet radiation is incident on a surface , no photoelectron...
Text Solution
|
A plane E.M. wave of frequency 40 MHz travels along X-axis. At same po...
Text Solution
|
A cuboidal piece of wood has dimensions a, b and c. its relatively den...
Text Solution
|
Young's modulus of elasticity is the ratio of
Text Solution
|
For an eye kept at a depth h inside water is refractive index mu, and ...
Text Solution
|
The magnification of an image by a convex lens is positive only when t...
Text Solution
|
Moment of inertia of a uniform circular disc about a diameter is I. It...
Text Solution
|
The moment of inertia of a ring about an axis passing though the centr...
Text Solution
|
To get an output y = 1 in the given circuit , which of the following i...
Text Solution
|
The currents through diodes D1and D2 are
Text Solution
|
The apparent coefficient of expansion of a liquid when heated, filled ...
Text Solution
|
In the expression P =E I^2 m^(-5) G^(-2), E, m, I and G denote energy,...
Text Solution
|
(a) Why are coherent sources necessary to produce a sustained interfer...
Text Solution
|
From Brewster's law, except for polished metallic surfaces, the polari...
Text Solution
|