Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • A freshly prepared radioactive source of half life 2 hours emits radiation of intensity which is

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

Answers (1)

best_answer

we know that 

Number of nuclei in terms of half life

N=\frac{N_{0}}{2^{t/t_{1/2}}}

and it is also given that N_0=64N_s

 

where N_s is corresponding to safe limit

and t_{\frac{1}{2}}=2h

so we get 

N_s=64N_se^{-\frac{ln2*t}{2}}

after solving we get t=12 hours

Posted by

avinash.dongre

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NEET UG 2026 correction facility opens at neet.nta.nic.in; exam on May 3
anam-khan

NEET 2026 LIVE: NTA application correction window closes today; admit card, exam dates, pattern
anam-khan

NEET 2026 registration deadline extended to March 11 for MBBS, BDS; exam on May 3

Latest Question