MCQEasyJEE Main 2023 · 29 January, Shift 1Radioactive Decay & Half-Life

Physics Question from JEE Main 2023 · 29 January, Shift 1

If a radioactive element with a half-life of 30min30 \, \text{min} undergoes beta decay, the fraction of the radioactive element that remains undecayed after 90min90 \, \text{min} is:

  • A

    18\frac{1}{8}

  • B

    116\frac{1}{16}

  • C

    14\frac{1}{4}

  • D

    12\frac{1}{2}

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