Solve

Guides

0

You visited us 0 times! Enjoying our articles? Unlock Full Access!

Introduction to Radioactivity

Question

The count rate of a radioactive nuclei falls from $$992$$ counts per minute to $$62$$ counts per minutes in $$10\ hour$$. The half-life of the element is :

A

$$1\ hour$$

B

$$2.5\ hour$$

C

$$5\ hour$$

D

$$6\ hour$$

Open in App

Solution

Verified by Toppr

Correct option is B. $$2.5\ hour$$

Was this answer helpful?

0

Similar Questions

Q1

The count rate of a radioactive nuclei falls from $$992$$ counts per minute to $$62$$ counts per minutes in $$10\ hour$$. The half-life of the element is :

View Solution

Q2

A freshly made radioactive sample gives a count rate of

8000

counts per minute. After twenty days, it gives a count-rate of

500

counts per minute. What is the half-life of the material?

View Solution

Q3

A count rate meter shows a count of

240

per minute from a given radioactive source. One hour later the meter shows a count rate of

30

per minute. The half-life of the source is?

View Solution

Q4

A count rate meter shows a count of 240 per minute from a given radioactive source. One hour later the meter shows a count rate of 3.0 per minute. The half life of the source is

View Solution

Q5

A rate-meter measures the number of disintegrations per second from a radioactive source. It gives a count of

320

counts per second. Ninety minutes later, it gives

40

counts per second. The half life of the source is

View Solution