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MHT CET Physics Model Test 05 — MHT - CET STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceMHT - CETMHT CET Physics Model Test 051 Mark
MCQ
Two radioactive materials $Y_1$ and $Y_2$ have decay constants '5`lambda`' and `lambda` respectively. Initially they have same number of nuclei. After time 't', the ratio of number of nuclei of $Y_1$ to that of $Y_2$ is `1/"e"`, then 't' is equal to ______.
  • A
    `lambda`
  • B
    `"e"/lambda`
  • C
    `lambda/2`
  • ✓
    `1/(4lamda)`
✓

Answer

Correct option: D.
`1/(4lamda)`
D

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