MHT-CET

Nuclei question bank (Physics)

Practice 55 free MHT-CET Physics - Nuclei questions with answers and step-by-step solutions.

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Q1.

$A$ radioactive element having a half-life of $30 \ min$ is undergoing beta decay. The fraction of the radioactive element that remains undecayed after $90 \ min$ will be:

(A)
$\frac{1}{2}$
(B)
$\frac{1}{4}$
(C)
$\frac{1}{8}$
(D)
$\frac{1}{16}$
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Q2.

$A$ radioactive substance has a half-life of $60 \text{ minutes}$. During $3 \text{ hours}$,the amount of substance decayed would be: (in $\%$)

(A)
$8.5$
(B)
$12.5$
(C)
$25$
(D)
$87.5$
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