Q.

A radioactive sample has No active atoms at t=0 . If the rate of disintegration at any time is R and the number of atoms is N, then the ratio R/N varies with time as

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a

b

c

d

answer is D.

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Detailed Solution

i.e. graph between   and t, be a straight line parallel to the time axis
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A radioactive sample has No active atoms at t=0 . If the rate of disintegration at any time is R and the number of atoms is N, then the ratio R/N varies with time as