(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

State two dissimilarities between the γ-rays and X-rays.

State the penetrating range of α, β and γ radiations.

Give the relative ionizing power of α, β and γ radiations.

What happens to the atomic number of element when an α -particle is emitted?

What happens to the mass number of an element when an α -particle is emitted?

A radioactive source emits three types of radiations. Name them.
(i) Name the radiations which are charged.
(ii) Name the radiations which are most penetrating.
(iii) Name the radiations which travel with the speed of light.
(iv) Name the radiations which have the largest mass.

What kind of change takes place in a nucleus when a β -particle is emitted?

In following fig.  shows a mixed source S of alpha and beta particles in a thick lead container. The particles pass through a magnetic field in a direction perpendicular to the plane of paper (inwards as shown by x). State and show in the diagram how the particles get affected.

In the following  fig. shows a radioactive source S in a thick lead container. The radiations pass through an electric field between the plates P and Q. Complete the diagram to show the paths of α , β and γ radiations.

Why is the source S placed in a thick lead container?

Define the term radioactivity.

Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?

A radioactive nuclide `""_86^226` Ra decays by emission of two alpha particles, one beta particle and gamma rays. Which of the following is the resulting nuclide X?

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?