GATE XE · 2026 · XE-I
Question 189: Energy Resources and Conversion Technologies
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Question 189
XE-IMCQ2 marksNeeds review
A radioactive isotope sample has a decay constant
. Initially the sample contains
atoms. The sample decays to 25% of its initial value. The number of years it takes to decay to this stage is closest to ________________Your answerChoose one option.
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2026XE-I
GATE XE 2026 · Paper 1
Engineering Sciences · Original paper archive
- Section
- Section XE-I
- Question type
- Multiple choice (MCQ)
- Marks
- 2 marks
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