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Answer the following questions based on a hot cathode ray tube.
State the approximate voltage used to heat the filament
Arrange α, β, and γ rays in ascending order with respect to their
1) Penetrating power.
2) Ionising power
3) Biological effect
Complete the diagram as given above by drawing the deflection of radioactive radiations in an electric field
Radioactive substances were found to give off three types of rays. Name them. How do they
(a) React to the magnetic field?
(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
How is a cathode ray beam affected while passing through an electric field?
How is a cathode ray tube used to convert an electrical signal into a visual signal?
Two radioactive sources A and B of half lives of 1 hour and 2 hours, respectively, initially contain the same number of radioactive atoms. At the end of two hours, their rates of disintegration are in the ratio of ______.
The activity of a certain radionuclide decreases to 15 percent of its original value in 10 days. What is its half life?
[ln (0.15) = -1.9]
The mean lives of a radioactive substance are 1620 and 405 years for β-emission and β-emission respectively. The time after which three fourth of a sample will decay if it is decaying both by β-emission and β-emission simultaneously will be ______ years.
(Take ln 2 = 0.693)
In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
