AP EAMCET Engineering 2018 Apr 24 Shift 1 Paper

Section: Physics

Question : 118 of 160

Marks: +1, -0

A radioactive element 'X' converts into another stable element 'Y'. Half life of X is 2 hours. Initially only X is present. After a time 't' , if the ratio of atoms of X to Y is 1 : 4 then the value of 't‘ is

2 hours
4 hours
Between 4 hours and 6 hours
6 hours

Validate

Solution:

The radioactive decay equation is,

)

Substitute values.

)

(

)

As,

<3
$4

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