PH-693
Background radiation
Physics · Secondary 3 · Hard · Background radiation
Without a source, a detector measures 20 counts in 10 s. With a radioactive source placed nearby, it measures 80 counts in 10 s. What is the count rate due to the source only, in counts per second?
- 2 counts per second
- 4 counts per second
- 6 counts per second
- 8 counts per second
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.