JEE Main 2017 Solved Paper Solved Paper

Section: Physics

Question : 9 of 90

Marks: +1, -0

A radioactive nucleus A with a half life T, decays into a nucleus B. At t = 0, there is no nucleus B.At sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by :A radioactive nucleus A with a half life T, decays into a nucleus B. At t = 0, there is no nucleus B. At sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by :

[Main 2017]

t = T log (1.3)
t=
T
log(1.3)
t=
Tlog2
log1.3
t=T
log1.3
log2

Validate

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