Physics-
General
Easy
Question
The count rate for 10g of radioactive material was measured at different times and this has been shown in figure with scale given. The half-life of the material and the total count in the first half value period, respectively are
- 4 h and 9000 (approximately)
- 3 h and 14100 (approximately)
- 3 h and 235 (approximately)
- 10 h and 157 (approximately)
The correct answer is: 3 h and 14100 (approximately)
Taking average count per minute in the first half value period as (100+50)/2 
, 75
Total number of counts during this period 
which is closest to the given result (14100)
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