JEE · NEET Previous Year Question
Activity of a radioactive sample decreases to of its original value in 3 days. Then, in 9 days its activity will become
Topic: JEE PYQ
Answer: A. Full step-by-step solution below.
- A of the original value
- B
- C of the original value
- D of the original value.
Correct answer: A
Solution
(b) Just as the time required for the activity to be reduced to half the original value is called half-life, to be reduced to of the original activity can be called life.There is 2 one third life, the activity will be reduced to .
More Nuclei PYQs
- A radioactive nucleus can decay by two different processes. The half lives of the first and second decay processes are…
- -decay of a parent nucleus results in a daughter nucleus Y. If and are the mas…
- Half life of a radioactive element is 12.5 hour and its quantity is 256 . After how much time its quantity will remain 1 ?
- The activity of a radioactive sample is measured as counts per minute at and counts per minute at…
- A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented n…