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A freshly prepared radioactive sample of half life time 2 hr emits radiation which is 64 times the permissible safe level of dose. The minimum time after which it would be possible to work safely with the source is 1. 6 h 2. 12 h 3. 24 h 4. 128 h


A freshly prepared radioactive sample of half life time 2 hr emits radiation which is 64 times the permissible safe level of dose. The minimum time after which it would be possible to work safely with the source is
1.     6 h
2.     12 h
3.     24 h
4.     128 h


Grade:upto college level

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