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Standard XII
Physics
First Order Radioactive Decay
Question

The half life of freshly prepared radioactive sample is $$2$$ hours. If the sample emits radiation of intensity which is $$32$$ times the permissible safe level, then the maximum time taken after which it would be possible to work safely with source is :

A
$$8$$ hour
B
$$16$$ hour
C
$$10$$ hour
D
$$2$$ hour
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Solution
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Correct option is B. $$10$$ hour

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