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 second, at t=6 seconds is close to : |
|||

(a) |
150 |
(b) |
360 |

(c) |
200 |
(d) |
400 |

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 second, at t=6 seconds is close to : |
|||

(a) |
150 |
(b) |
360 |

(c) |
200 |
(d) |
400 |

1 Answer

127 votes

at t=0, = =1600C/s

at t=8s, A=100C/s

= in 8 sec

Therefore half-life is =2 sec

Activity at t = 6 will be 1600

= 200C/s

correct answer is (c).

127 votes

127