Advertisements
Advertisements
Question
Mention four properties of Becquerel rays.
Advertisements
Solution
The four properties of Becqueral rays are:
(i) They have penetrating power.
(ii) They affect a photographic plate.
(iii) They can ionize a gas or air through which they pass.
(iv) They are deflected by electric and magnetic fields.
RELATED QUESTIONS
State three factors on which the rate of emission of electrons from a metal surface depends
State the energy conversion taking place in a cathode ray tube
Name the unit in which the work function of a metal is expressed.

Complete the diagram as given above by drawing the deflection of radioactive radiations in an electric field
In a cathode ray tube state:
(i) the purpose of covering cathode by thorium and carbon.
(ii) the purpose of the fluorescent screen.
(iii) how is it possible to increase the rate of emission of electrons.
An electromagnetic radiation is used for photography in fog. [2]
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose ?
What do you mean by Mass number.
Give the relative ionizing power of α, β and γ radiations.
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?
