Home
Class 12
PHYSICS
Some amount of a radioactive substance (...

Some amount of a radioactive substance (half-life = 10 days ) is spread inside a room and consequently, the level of radiation becomes 10 times the permissible level for normal occupancy of the room. After how many days will the room be safe for occupation ?

A

6

B

7

C

4

D

5

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR PHYSICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE PRACTICE SHEET (ADVANCED) More than one correct answer Type Questions|5 Videos

  • NUCLEAR PHYSICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE PRACTICE SHEET (ADVANCED) Linked Comprehension Type Questions Passage-I :|2 Videos

  • NUCLEAR PHYSICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE LEVEL-II (LECTURE SHEET (ADVANCED)) Integer Type Questions )|3 Videos

  • MOVING CHARGES AND MAGNETISM

    AAKASH SERIES|Exercise EXERCISE-III|49 Videos

  • NUCLEI

    AAKASH SERIES|Exercise Practice Exercise|40 Videos

Similar Questions

Explore conceptually related problems

Some amount of a radioactive substance (half-life =10 days ) is spread inside a room and consequently the level of radiation become 50 times the permissible level for normal occupancy of the room. After how many days will the room be safe for occupation?.

Some amount of a radioactice substance (half-life =10 days ) is spread inside a room and consequently the level of radiation become 50 times the permissible level for normal occupancy of the room. After how many days will the room be safe for occupation?.

As accident in a nuclear laboratory resulting in deposition of a certain amount of radioactive material of half life 18 days inside the laboratory Tests revealed that the radiation was 64 times more than the permissible level required for save operation of the laboratory what is the minimum number of days after which the laboratory can be considered safe for use?

A radioactive element (t_(1//2) = 50 days) is spread over a room. Its activity is 30 times the permisisble value for safe working. Calculate the number of days after which the room will be available for safe working.

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

A sample of a radioactive substance has 10^(6) radioactive nuclei. Its half life time is 20 s How many nuclei will remain after 10 s ?

A radioactive material has half-life of 10 days. What fraction of the material would remain after 30 days ?

The half life period of a radioactive substance is 140 days. After how much time, 15 g will decay from a 16 g sample of the substance?

A radioactive sample of half life 10 days contains 1000X nuclei. Number of original nuclei present after 5 days is

A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is