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Atomic and Nuclear Physics — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsAtomic and Nuclear Physics1 Mark
Question

A and B are two radioactive substances whose half lives are 1 and 2 years respectively. Initially 10 gm of A and 1 gm of B is taken. The time (approximate) after which they will have same quantity remaining is

(a) 6.62 years

(b) 5 years

(c) 3.2 years

(d) 7 years
✓

Answer

(a) 6.62 years

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