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Using a nuclear counter the count rate o...

Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t=0 it was 1600 counts per second and t = 8 seconds it was 100 counts per second. The count rate observed, as counts per seconds, at t=6, seconds is close to :

A

250

B

400

C

300

D

200

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The correct Answer is:
D
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DISHA PUBLICATION-NUCLEI-EXERCISE - 1 CONCEPT BUILDER
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  2. A radioactive sample contains 10^(-3) kg each of two nuclear species A...

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  4. If N(0) is the original mass of the substance of half - life period t(...

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  9. In a smaple of rock, the ration .^(206)Pb to .^(238)U nulei is found ...

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  10. A radioactive sample with a half-life of 1 month has the label : 'Acti...

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  13. There are n number of radioactive nuclei in a sample that undergoes be...

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  14. The half life of a radio isotope is 5 years . The fraction which will ...

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  15. In the given reaction .z X^A rarr .(z+1)Y^A rarr .(z-1) K^(A - 4) ra...

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  18. Consider a radioactive material of half-life 1.0 minute. If one of the...

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  19. A sample of radioactive element has a mass of 10 g at an instant t=0. ...

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  20. alpha-particles and gamma-rays are all having same energy . Their pene...

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