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

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?

Explain the use of radioactive in the field of medicine, agriculture and industry.

What are the uses of radioactive isotopes in following?
(a) Medical field,
(b) Agriculture,
(c) Industries?

A radioactive nucleus `""_"Z"^"A"` X first emits a beta particle and then an alpha particle to give the resulting nucleus `""_"Q"^"P"` Y  What will be the values of P and Q in terms of A and Z?

A nucleus of an element X which has the symbol `""_84^202` X emits an alpha particle and then a beta particle. The final nucleus is `""_"b"^"a"` Y Find a and b.

In an experiment of finding the refractive index of glass, if blue light is replaced by the red light, how will the refractive index of glass change? Give reason in support of your answer.

Which colour of light travels fastest in any medium except air?

Light of a single colour is passed through a liquid having a piece of glass suspended in it. On changing the temperature of liquid, at a particular temperature, the glass piece is not seen.

Why is the light of a single colour used ?

Draw a ray diagram showing the lateral displacement of a ray of light when it passes through a parallel sided glass slab.

A ray of light strikes the surface at a rectangular glass slab such that the angle of incidence is 45^o.

In each case, draw diagram to show the path taken by the ray as it passes through the glass slab and emerges from it.