Electromagnetic WavesHard

Question

For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is :-

Options

A.

20

B.

10

C.

30

D.

15

Solution

N0 = 600, N' = 450
N = N0 – N'
N =150
NNo=12t/TH      ⇒150600=12t/10⇒14=12t/10          ⇒122=12t/102=t10⇒t=20 min

Create a free account to view solution

View Solution Free
Topic: Electromagnetic Waves·Practice all Electromagnetic Waves questions

More Electromagnetic Waves Questions

Electromagnetic waves is invented by :-...The electric field a plane electromagnetic wave is given by :$E_{y} = 69sin\left\lbrack 0.6 \times 10^{3}x - 1.8 \times ...The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the infr...The magnetic field in a travelling electromagnetic wave has a peak value of 20nT. The peak value of electric field stren...The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant $k = 3$ and permeability...